Reorganize into role-based folders and consolidate art

Move every script and scene into role-based directories (actors/, systems/, ui/,
levels/, props/) and all raw art under art/ (grouped by role, snake_case,
Extract-Textures GLBs), dropping Blender version-suffix noise. Filenames are
snake_case (PascalCase reserved for class_name) to avoid case-insensitive
filesystem aliasing on the web/macOS targets. Routes the bull's hits through the
typed DamageEvent pipeline and wires the bull's abilities to the Fx library.
Updates CLAUDE.md's folder-layout overview to match.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CCyaJPTHCH9EDthpf4A5Sj

systems/crowd/publikum_controller.gd

@@ -0,0 +1,12 @@
+extends Node3D
+
+
+func _ready() -> void:
+	# Mark the crowd so debug overlays (show_animation_name / show_bones) skip it —
+	# 72 ambient clapping spectators would otherwise flood the view with tags.
+	add_to_group(&"public")
+	for child in get_children():
+		var anim := child.get_node_or_null(^"AnimationPlayer") as AnimationPlayer
+		if anim:
+			anim.speed_scale = randf_range(0.5, 1.5)
+			anim.play(&"ArmatureAction")