Add Transition Configurator plugin for easy exit configuration

Features:
- Fuzzy search for finding destination rooms
- Lists all TransitionPieces in selected room as arrival points
- Bidirectional wiring - updates return transition automatically
- Auto-reloads destination scene in editor
- UndoRedo support for source scene changes

Files added:
- addons/transition_configurator/plugin.cfg
- addons/transition_configurator/transition_configurator.gd
- addons/transition_configurator/transition_inspector_plugin.gd
- addons/transition_configurator/config_dialog.gd
- addons/transition_configurator/fuzzy_search.gd
- addons/transition_configurator/README.md

addons/transition_configurator/README.md

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+# Transition Configurator Plugin
+
+A Godot 4.x editor plugin that simplifies configuring TransitionPiece exits in the King's Quest IV remake.
+
+## Features
+
+- **Fuzzy search** for finding rooms quickly
+- **Visual selection** of destination TransitionPieces as arrival points
+- **Bidirectional wiring** - automatically updates return transitions
+- **Validation** - warns if destination doesn't have appropriate arrival points
+- **Auto-reload** - refreshes scenes in editor after changes
+
+## Installation
+
+1. Copy the `addons/transition_configurator/` folder to your project's `addons/` directory
+2. Enable the plugin in Project Settings → Plugins
+3. Restart the editor (recommended)
+
+## Usage
+
+1. Select a TransitionPiece node in your scene
+2. In the Inspector, click the **"Configure Exit..."** button
+3. Use the search box to filter rooms (fuzzy matching)
+4. Click on a room to see its available TransitionPieces
+5. Select an arrival point
+6. Click **Apply Changes**
+
+The plugin will:
+- Update the selected TransitionPiece's `target` and `appear_at_node` properties
+- Update (or create) the return transition in the destination room
+- Reload the destination scene in the editor
+
+## How It Works
+
+- **Room Discovery**: Scans `res://scenes/` for `.tscn` files starting with `kq4_`
+- **Arrival Points**: Lists all TransitionPiece instances in the selected room
+- **Bidirectional Updates**: Finds or creates a return TransitionPiece named after the current room
+- **UID Resolution**: Extracts UIDs from scene files for proper target references
+
+## Files
+
+- `plugin.cfg` - Plugin metadata
+- `transition_configurator.gd` - Main EditorPlugin entry point
+- `transition_inspector_plugin.gd` - Adds UI to TransitionPiece inspector
+- `config_dialog.gd` - Configuration dialog with search and selection
+- `fuzzy_search.gd` - Fuzzy text matching utility
+
+## Requirements
+
+- Godot 4.x
+- TransitionPiece class (class_name TransitionPiece)
+- Room scenes in `res://scenes/` following `kq4_XXX_*` naming convention
+
+## Notes
+
+- The plugin uses UndoRedo for source scene changes
+- Destination scene changes are saved and reloaded automatically
+- If bidirectional update fails, the source changes are still applied