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/transition_inspector_plugin.gd

@@ -0,0 +1,43 @@
+@tool
+extends EditorInspectorPlugin
+
+const CONFIG_DIALOG = preload("res://addons/transition_configurator/config_dialog.gd")
+
+var config_dialog: Window = null
+
+func _can_handle(object: Object) -> bool:
+	return object is TransitionPiece
+
+func _parse_begin(object: Object) -> void:
+	var container = VBoxContainer.new()
+	container.add_theme_constant_override("separation", 10)
+	
+	# Header label
+	var header = Label.new()
+	header.text = "Exit Configuration"
+	header.add_theme_font_size_override("font_size", 14)
+	container.add_child(header)
+	
+	# Configure button
+	var button = Button.new()
+	button.text = "Configure Exit..."
+	button.custom_minimum_size = Vector2(200, 40)
+	button.pressed.connect(_on_configure_pressed.bind(object))
+	container.add_child(button)
+	
+	# Separator
+	var separator = HSeparator.new()
+	separator.add_theme_constant_override("separation", 10)
+	container.add_child(separator)
+	
+	add_custom_control(container)
+
+func _on_configure_pressed(transition_piece: TransitionPiece) -> void:
+	if config_dialog == null:
+		config_dialog = CONFIG_DIALOG.new()
+		add_child(config_dialog)
+	
+	config_dialog.transition_piece = transition_piece
+	config_dialog.populate_rooms()
+	
+	EditorInterface.popup_dialog_centered(config_dialog, Vector2i(900, 600))