Installed Surge, fixed compile errors, moved a bunch of external stuff into folder

Assets/External/Plugins/codeandweb.com/Editor/SettingsTexturePackerImporter.txt

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+version: 2
+tpsheetFileNames:
+- Assets/Art/Sprites/Spritesheets/Characters/Gardener/Gardener-IdleRun.tpsheet
+- Assets/Art/Sprites/Spritesheets/Characters/Gardener/Gardener-Scared01.tpsheet
+- Assets/Art/Sprites/Spritesheets/Characters/Pulver/Pulver.tpsheet
+- Assets/Art/Sprites/Spritesheets/Characters/Pulver/pulver.tpsheet
+- Assets/Art/Sprites/Spritesheets/Characters/Trafalgar/trafalgar.tpsheet
+- Assets/Art/Sprites/Spritesheets/Quarry/Bush_01.tpsheet
+- Assets/Art/Sprites/Spritesheets/Quarry/Bush_02.tpsheet
+- Assets/Art/Sprites/Spritesheets/Quarry/Bush_03.tpsheet
+- Assets/Art/Sprites/Spritesheets/Quarry/Quarry.tpsheet
+- Assets/Art/Sprites/Spritesheets/Quarry/Trees.tpsheet
+- Assets/External/Plugins/codeandweb.com/Example/SpriteSheet/sprites.tpsheet
+textureFileNames:
+- Assets/Art/Sprites/Spritesheets/Characters/Gardener/Gardener-IdleRun.png
+- Assets/Art/Sprites/Spritesheets/Characters/Gardener/Gardener-Scared01.png
+- Assets/Art/Sprites/Spritesheets/Characters/Pulver/Pulver.png
+- Assets/Art/Sprites/Spritesheets/Characters/Pulver/Pulver.png
+- Assets/Art/Sprites/Spritesheets/Characters/Trafalgar/trafalgar.png
+- Assets/Art/Sprites/Spritesheets/Quarry/Bush_01.png
+- Assets/Art/Sprites/Spritesheets/Quarry/Bush_02.png
+- Assets/Art/Sprites/Spritesheets/Quarry/Bush_03.png
+- Assets/Art/Sprites/Spritesheets/Quarry/Quarry.png
+- Assets/Art/Sprites/Spritesheets/Quarry/Trees.png
+- Assets/External/Plugins/codeandweb.com/Example/SpriteSheet/sprites.png
+normalmapFileNames:
+- 
+- 
+- 
+- 
+- 
+- 
+- 
+- 
+- 
+- 
+- Assets/External/Plugins/codeandweb.com/Example/SpriteSheet/sprites_n.png
+enableDebugOutput: 0

Assets/External/Plugins/codeandweb.com/Editor/SettingsTexturePackerImporter.txt.meta

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+fileFormatVersion: 2
+guid: 435705afe39a8fe4c8996916d6a2fa24
+TextScriptImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/External/Plugins/codeandweb.com/Editor/SpritesheetImporter.cs

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+/*
+ *  TexturePacker Importer
+ *  (c) CodeAndWeb GmbH, Saalbaustraße 61, 89233 Neu-Ulm, Germany
+ *
+ *  Use this script to import sprite sheets generated with TexturePacker.
+ *  For more information see https://www.codeandweb.com/texturepacker/unity
+ *
+ */
+
+using UnityEngine;
+using UnityEditor;
+
+// Note: TexturePacker Importer with Unity 2021.2 (or newer) requires the "Sprite 2D" package,
+//       please make sure that it is part of your Unity project. You can install it using
+//       Unity's package manager.
+
+#if UNITY_2021_2_OR_NEWER
+using UnityEditor.U2D.Sprites;
+using System.Collections.Generic;
+#endif
+
+
+namespace TexturePackerImporter
+{
+    public class SpritesheetImporter : AssetPostprocessor
+    {
+
+        void OnPreprocessTexture()
+        {
+            TextureImporter importer = assetImporter as TextureImporter;
+            SheetInfo sheet = TexturePackerImporter.getSheetInfo(importer);
+            if (sheet != null)
+            {
+                Dbg.Log("Updating sprite sheet " + importer.assetPath);
+#if UNITY_2021_2_OR_NEWER
+                updateSprites(importer, sheet);
+#else
+                importer.spritesheet = sheet.metadata;
+#endif
+            }
+        }
+
+
+#if UNITY_2021_2_OR_NEWER
+        private static void updateSprites(TextureImporter importer, SheetInfo sheet)
+        {
+            var dataProvider = GetSpriteEditorDataProvider(importer);
+            var spriteNameFileIdDataProvider = dataProvider.GetDataProvider<ISpriteNameFileIdDataProvider>();
+
+            var oldIds = spriteNameFileIdDataProvider.GetNameFileIdPairs();
+            SpriteRect[] rects = sheetInfoToSpriteRects(sheet);
+            SpriteNameFileIdPair[] ids = generateSpriteIds(oldIds, rects);
+
+            dataProvider.SetSpriteRects(rects);
+            spriteNameFileIdDataProvider.SetNameFileIdPairs(ids);
+            dataProvider.Apply();
+            EditorUtility.SetDirty(importer);
+        }
+
+
+        private static ISpriteEditorDataProvider GetSpriteEditorDataProvider(TextureImporter importer)
+        {
+            var dataProviderFactories = new SpriteDataProviderFactories();
+            dataProviderFactories.Init();
+            var dataProvider = dataProviderFactories.GetSpriteEditorDataProviderFromObject(importer);
+            dataProvider.InitSpriteEditorDataProvider();
+            return dataProvider;
+        }
+
+
+        private static SpriteRect[] sheetInfoToSpriteRects(SheetInfo sheet)
+        {
+            int spriteCount = sheet.metadata.Length;
+            SpriteRect[] rects = new SpriteRect[spriteCount];
+
+            for (int i = 0; i < spriteCount; i++)
+            {
+                SpriteRect sr = rects[i] = new SpriteRect();
+                SpriteMetaData smd = sheet.metadata[i];
+
+                sr.name = smd.name;
+                sr.rect = smd.rect;
+                sr.pivot = smd.pivot;
+                sr.border = smd.border;
+                sr.alignment = (SpriteAlignment)smd.alignment;
+
+                // sr.spriteID not yet initialized, this is done in generateSpriteIds()
+            }
+
+            return rects;
+        }
+
+
+        private static SpriteNameFileIdPair[] generateSpriteIds(IEnumerable<SpriteNameFileIdPair> oldIds,
+                                                                SpriteRect[] sprites)
+        {
+            SpriteNameFileIdPair[] newIds = new SpriteNameFileIdPair[sprites.Length];
+
+            for (int i = 0; i < sprites.Length; i++)
+            {
+                sprites[i].spriteID = idForName(oldIds, sprites[i].name);
+                newIds[i] = new SpriteNameFileIdPair(sprites[i].name, sprites[i].spriteID);
+            }
+
+            return newIds;
+        }
+
+
+        private static GUID idForName(IEnumerable<SpriteNameFileIdPair> oldIds, string name)
+        {
+            foreach (SpriteNameFileIdPair old in oldIds)
+            {
+                if (old.name == name)
+                {
+                    return old.GetFileGUID();
+                }
+            }
+            return GUID.Generate();
+        }
+#endif
+
+    }
+}

Assets/External/Plugins/codeandweb.com/Editor/SpritesheetImporter.cs.meta

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+fileFormatVersion: 2
+guid: ae0f647d5e34ec54aa12a6537f26846e

Assets/External/Plugins/codeandweb.com/Editor/TexturePackerImporter.dll.meta

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+fileFormatVersion: 2
+guid: 32407bfb60524de459d55af042e0c772

Assets/External/Plugins/codeandweb.com/Editor/UIImageSetSizeAndPivot.cs

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+using UnityEditor;
+using UnityEngine;
+using UnityEngine.UI;
+
+public static class UIImageMenu
+{
+
+    [MenuItem("GameObject/UI/Set Native Size + Pivot", false, 10000)]
+    private static void setSizeAndPivot()
+    {
+        foreach (GameObject gameObject in Selection.gameObjects)
+        {
+            // process all selected game objects which have a RectTransform + Image
+            RectTransform transform = gameObject.GetComponent<RectTransform>();
+            Image image = gameObject.GetComponent<Image>();
+
+            if (transform && image && image.sprite)
+            {
+                // set size as it is defined by source image sprite
+                image.SetNativeSize();
+
+#if UNITY_2018_1_OR_NEWER
+                // use mesh defined by source sprite to render UI image
+                image.useSpriteMesh = true;
+#endif
+
+                // set pivot point as defined by source sprite
+                Vector2 size = transform.sizeDelta * image.pixelsPerUnit;
+                Vector2 pixelPivot = image.sprite.pivot;
+                // sprite pivot point is defined in pixel, RectTransform pivot point is normalized
+                transform.pivot = new Vector2(pixelPivot.x / size.x, pixelPivot.y / size.y);
+            }
+        }
+    }
+
+}

Assets/External/Plugins/codeandweb.com/Editor/UIImageSetSizeAndPivot.cs.meta

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+fileFormatVersion: 2
+guid: a35fa07fc5209af419373e604647b984