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).

tests/deterministic_simulation_test.gd

@@ -2,9 +2,11 @@ extends SceneTree
 
 var failures: Array[String] = []
 
+
 func _initialize() -> void:
 	call_deferred("_run")
 
+
 func _run() -> void:
 	var clock := SimulationClock.new(1.0)
 	_check(clock.advance(0.4) == 0, "Clock should not tick before its interval")
@@ -28,6 +30,7 @@ func _run() -> void:
 		push_error("[TEST] " + failure)
 	quit(1)
 
+
 func _run_scenario(seed_value: int) -> String:
 	var manager: Node = load("res://simulation/SimulationManager.gd").new()
 	manager.simulation_seed = seed_value
@@ -47,6 +50,7 @@ func _run_scenario(seed_value: int) -> String:
 	manager.free()
 	return checksum
 
+
 func _check(condition: bool, message: String) -> void:
 	if not condition:
 		failures.append(message)