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).

simulation/actions/ActionSelectionResult.gd

@@ -4,9 +4,7 @@ extends RefCounted
 var action_id: StringName
 var duration_override := -1.0
 
-func _init(
-	selected_action_id: StringName,
-	selected_duration_override: float = -1.0
-) -> void:
+
+func _init(selected_action_id: StringName, selected_duration_override: float = -1.0) -> void:
 	action_id = selected_action_id
 	duration_override = selected_duration_override