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

actors/matador/matador.tscn

@@ -0,0 +1,28 @@
+[gd_scene format=3 uid="uid://d0te4mwbh33ag"]
+
+[ext_resource type="Script" uid="uid://bvfa7xi0luysk" path="res://actors/matador/matador.gd" id="1_matgd"]
+[ext_resource type="PackedScene" uid="uid://eu2lqjhowj4t" path="res://art/characters/matador.glb" id="2_matfbx"]
+
+[sub_resource type="CapsuleShape3D" id="CapsuleShape3D_body"]
+radius = 0.25
+height = 1.2
+
+[sub_resource type="CapsuleShape3D" id="CapsuleShape3D_hit"]
+radius = 0.45
+height = 1.4
+
+[node name="Matador" type="CharacterBody3D" unique_id=1781857630]
+script = ExtResource("1_matgd")
+
+[node name="CollisionShape3D" type="CollisionShape3D" parent="." unique_id=2101651042]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0.85, 0)
+shape = SubResource("CapsuleShape3D_body")
+
+[node name="HitArea" type="Area3D" parent="." unique_id=745037545]
+monitorable = false
+
+[node name="CollisionShape3D" type="CollisionShape3D" parent="HitArea" unique_id=1497356275]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0.85, 0)
+shape = SubResource("CapsuleShape3D_hit")
+
+[node name="matador2" parent="." unique_id=1487256381 instance=ExtResource("2_matfbx")]