feat: Implement Live Director System for interactive simulation control

- Added waypoint context updates to handle action queue statuses in `waypoint_context.gd`.
- Introduced new scene file `manwalk.scene` with terrain and stickman setup.
- Created architecture summary for the Live Director System detailing core state transitions, physics mechanics, UI elements, and action execution.
- Specified class contracts and interfaces for the Live Director implementation in `phase_12_live_director.md`.
- Defined state transitions, input handling, and queue editing mechanics for the Live Director feature.

scripts/stickman_locomotion.gd

@@ -366,6 +366,22 @@ func cancel_walk(restore_idle_pose: bool = true) -> void:
 func is_walking() -> bool:
 	return _walking
 
+
+func ensure_grounded_walk_animation() -> void:
+	if _rig == null or _rig.state != StickmanRig.RigState.ANIMATED or not _walking:
+		return
+	if terrain_motion != TerrainMotion.GROUNDED or blocks_walking():
+		return
+	if _rig._anim_player == null or not is_instance_valid(_rig._anim_player) or not _rig._anim_player.has_animation("walk_right"):
+		return
+	if _terrain_paused_walk_animation:
+		if _rig._anim_player.is_playing():
+			_terrain_paused_walk_animation = false
+		else:
+			_resume_walk_animation()
+	elif not _rig._anim_player.is_playing():
+		_rig._anim_player.play("walk_right")
+
 func get_foot_offset() -> Vector2:
 	return FOOT_OFFSET
 
@@ -479,6 +495,7 @@ func reset_for_ragdoll_handoff() -> void:
 	air_fall_distance = 0.0
 	terrain_motion = TerrainMotion.DISABLED
 	terrain_air_velocity = Vector2.ZERO
+	_reset_foot_contacts()
 
 func is_action_blocked() -> bool:
 	return terrain_motion == TerrainMotion.LANDING_IMPACT