Refactor animation generation: replace create_walk.gd with create_animations.gd

- Removed the old create_walk.gd script, which generated walk animations.
- Introduced create_animations.gd to unify the generation of walk_left, walk_right, and stand_up animations.
- Added a new SpinBox for rest timeout configuration in physics_test_harness.gd.
- Enhanced StickmanRig to support automatic recovery from ragdoll state with configurable timeout.
- Implemented recovery logic in StickmanRig, allowing for smooth transitions from ragdoll to animated state.
- Updated animation generation logic to use new pose templates for standing and lying down positions.

.opencode/agents/tester.md

@@ -60,7 +60,7 @@ Use the built-in GUT lifecycle methods properly:
 - Use `yield_to()` or `yield_for()` when waiting for `signals` or timers.
 - Use `add_child_autofree(node)` if a node needs to be inside the SceneTree to function.
 - Use `double()` or `partial_double()` to mock heavy dependencies like network managers.
-- Verify syntax using '..\Godot_v4.4-stable_win64_console.exe" . --check-only'
+- Verify syntax using '..\Godot_v4.7.1-stable_win64_console.exe" . --check-only'
 
 ## 📝 Reference Code Template