style: apply gdformat formatting across the entire project

Auto-format all GDScript files using gdformat from gdtoolkit.
This is a baseline formatting pass to ensure consistent style:

- Normalizes indentation and spacing
- Wraps long lines to 100 characters
- Removes trailing whitespace
- Standardizes blank lines between functions

68 files reformatted, 8 files left unchanged (3rd-party addon files
with parse errors excluded).

addons/terrain_3d/menu/directory_setup.gd

@@ -29,19 +29,21 @@ func _init() -> void:
 func directory_setup_popup() -> void:
 	dialog = load(DIRECTORY_SETUP).instantiate()
 	dialog.hide()
-	
+
 	# Nodes
 	select_dir_btn = dialog.get_node("Margin/VBox/DirHBox/SelectDir")
 	selected_dir_le = dialog.get_node("Margin/VBox/DirHBox/LineEdit")
 
 	if plugin.terrain.data_directory:
 		selected_dir_le.text = plugin.terrain.data_directory
-		
+
 	# Icons
 	plugin.ui.set_button_editor_icon(select_dir_btn, "Folder")
-	
+
 	#Signals
-	select_dir_btn.pressed.connect(_on_select_file_pressed.bind(EditorFileDialog.FILE_MODE_OPEN_DIR))
+	select_dir_btn.pressed.connect(
+		_on_select_file_pressed.bind(EditorFileDialog.FILE_MODE_OPEN_DIR)
+	)
 	dialog.confirmed.connect(_on_close_requested)
 	dialog.canceled.connect(_on_close_requested)
 	dialog.get_ok_button().pressed.connect(_on_ok_pressed)
@@ -74,7 +76,7 @@ func _on_ok_pressed() -> void:
 	if not DirAccess.dir_exists_absolute(selected_dir_le.text):
 		push_error("Directory doesn't exist: ", selected_dir_le.text)
 		return
-	# Check if directory empty of terrain files		
+	# Check if directory empty of terrain files
 	var data_found: bool = false
 	var files: Array = DirAccess.get_files_at(selected_dir_le.text)
 	for file in files: