rnd(M02): extract third-person camera rig

Work-Package: M02-RND-CAMERA-001

src/scenes/player/no_camera_collision_policy.gd

@@ -0,0 +1,12 @@
+class_name NoCameraCollisionPolicy
+extends CameraCollisionPolicy
+
+## Identity collision policy preserving the pre-M02 sandbox camera behavior.
+
+
+## Returns the requested distance without physics queries or allocations.
+func resolve_camera_distance(
+		_camera_pivot: Node3D,
+		requested_distance_units: float
+) -> float:
+	return requested_distance_units