feat(sites): playable bounds rule with typed status

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

game/application/sites/playable_bounds_status.gd

@@ -0,0 +1,22 @@
+class_name PlayableBoundsStatus
+extends RefCounted
+
+enum State {
+	INSIDE,
+	NEAR_EDGE,
+	OUTSIDE,
+}
+
+var state: State
+var distance_to_edge_m: float
+var return_direction: Vector3
+
+
+func _init(p_state: State, p_distance_to_edge_m: float, p_return_direction: Vector3) -> void:
+	state = p_state
+	distance_to_edge_m = p_distance_to_edge_m
+	return_direction = p_return_direction
+
+
+func requires_warning() -> bool:
+	return state != State.INSIDE