Reorganize the codebase into role-based folders (snake_case)

Move the 40-odd root-level scripts and scenes into a tree that groups by role,
per the approved roadmap (WS2/WS3): actors/{player,matador,bear}, systems/{combat,
fx,input,debug,render,crowd,config}, ui/, props/ (was tscn_s/). Rename the shell
scene.tscn -> levels/game_shell.tscn and every PascalCase scene to snake_case
(Player.tscn -> player.tscn, MainMenu.tscn -> main_menu.tscn, etc.) so the
case-insensitive web/macOS filesystems can't alias two files together.

Done as a scripted move: each file travels with its .uid; every quoted res:// path
across scenes, scripts, .tres, and project.godot's 9 autoloads is rewritten; the
.godot uid/class cache is rebuilt from scratch. Scenes still resolve by uid, so the
rewrite is belt-and-suspenders. Lint globs (run_tests.sh + both CI workflows) now
walk the new dirs; an orphan animation_tree.gd.uid and 7 pre-existing trailing-
whitespace lints (barrel/torch, never covered by the old root-only glob) are cleaned.

Full suite green on both sides. Asset consolidation (Assets/Animations/fonts ->
art/) is deferred — moving imported .glb/.png/.ttf is safer done in the editor.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017KoYBYQgRyY1zDHXMsXY3V

props/barrel_broken.gd

@@ -0,0 +1,26 @@
+extends Node3D
+
+func _ready() -> void:
+	# 1. Set up the collision layers for the debris pieces
+	for child in get_children():
+		if child is RigidBody3D:
+			child.collision_layer = 2
+
+	# 2. Wait 4 seconds while the pieces settle on the ground
+	await get_tree().create_timer(5.0).timeout
+
+	# 3. Create a smooth 1-second fade out before deleting
+	var tween = create_tween().set_parallel(true)
+
+	for child in get_children():
+		if child is RigidBody3D:
+			for sub_child in child.get_children():
+				if sub_child is MeshInstance3D || sub_child.get_class() == "ImporterMeshInstance3D":
+
+						# Inside your tween loop:
+						# Shrinks the physical fragments to nothing over 1 second
+						tween.tween_property(child, "scale", Vector3.ZERO, 0.3)
+
+	# 4. Delete the scene once the fade finishes
+	await get_tree().create_timer(0.29).timeout
+	queue_free()