Create a simple dialogue authoring system, tied into our items (#10)

- Editor dialogue graph
- Asset importer for processing the graph into runtime data
- DialogueComponent that steers the dialogue interactions
- DialogueCanbas with a scalable speech bubble to display everything
- Brief README overview of the system

Co-authored-by: AlexanderT <alexander@foolhardyhorizons.com>
Co-authored-by: Michal Pikulski <michal.a.pikulski@gmail.com>
Reviewed-on: #10

Assets/Scripts/Interactions/Interactable.cs

@@ -25,7 +25,7 @@ namespace Interactions
         public UnityEvent interactionInterrupted;
         public UnityEvent characterArrived;
         public UnityEvent<bool> interactionComplete;
-
+        
         // Helpers for managing interaction state
         private bool _interactionInProgress;
         private PlayerTouchController _playerRef;