Refactoring of the interaction system and preliminary integration of save/load functionality across the game. (#44)

### Interactables Architecture Refactor
- Converted composition to inheritance, moved from component-based to class-based interactables. No more requirement for chain of "Interactable -> Item" etc.
- Created `InteractableBase` abstract base class with common functionality that replaces the old component
- Specialized child classes: `Pickup`, `ItemSlot`, `LevelSwitch`, `MinigameSwitch`, `CombinationItem`, `OneClickInteraction` are now children classes
- Light updates to the interactable inspector, moved some things arround, added collapsible inspector sections in the  UI for better editor experience

### State Machine Integration
- Custom `AppleMachine` inheritong from Pixelplacement's StateMachine which implements our own interface for saving, easy place for future improvements
- Replaced all previous StateMachines by `AppleMachine`
- Custom `AppleState`  extends from default `State`. Added serialization, split state logic into "EnterState", "RestoreState", "ExitState" allowing for separate logic when triggering in-game vs loading game
- Restores directly to target state without triggering transitional logic
- Migration tool converts existing instances

### Prefab Organization
- Saved changes from scenes into prefabs
- Cleaned up duplicated components, confusing prefabs hierarchies
- Created prefab variants where possible
- Consolidated Environment prefabs and moved them out of Placeholders subfolder into main Environment folder
- Organized item prefabs from PrefabsPLACEHOLDER into proper Items folder
- Updated prefab references - All scene references updated to new locations
- Removed placeholder files from Characters, Levels, UI, and Minigames folders

### Scene Updates
- Quarry scene with major updates
- Saved multiple working versions (Quarry, Quarry_Fixed, Quarry_OLD)
- Added proper lighting data
- Updated all interactable components to new architecture

### Minor editor tools
- New tool for testing cards from an editor window (no in-scene object required)
- Updated Interactable Inspector
- New debug option to opt in-and-out of the save/load system
- Tooling for easier migration

Co-authored-by: Michal Pikulski <michal.a.pikulski@gmail.com>
Reviewed-on: #44

Assets/Scripts/Interactions/OneClickInteraction.cs

@@ -1,37 +1,21 @@
 using UnityEngine;
-using System;
 using Input;
 using Interactions;
 
-/// <summary>
-/// MonoBehaviour that immediately completes an interaction when started.
-/// </summary>
-public class OneClickInteraction : MonoBehaviour
+namespace Interactions
 {
-    private Interactable interactable;
-
-    void Awake()
+    /// <summary>
+    /// Interactable that immediately completes when the character arrives at the interaction point.
+    /// Useful for simple trigger interactions that don't require additional logic.
+    /// </summary>
+    public class OneClickInteraction : InteractableBase
     {
-        interactable = GetComponent<Interactable>();
-        if (interactable != null)
+        /// <summary>
+        /// Override: Immediately completes the interaction with success when character arrives.
+        /// </summary>
+        protected override void OnCharacterArrived()
         {
-            interactable.interactionStarted.AddListener(OnInteractionStarted);
-        }
-    }
-
-    void OnDestroy()
-    {
-        if (interactable != null)
-        {
-            interactable.interactionStarted.RemoveListener(OnInteractionStarted);
-        }
-    }
-
-    private void OnInteractionStarted(PlayerTouchController playerRef, FollowerController followerRef)
-    {
-        if (interactable != null)
-        {
-            interactable.BroadcastInteractionComplete(true);
+            CompleteInteraction(true);
         }
     }
 }