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/sword.tscn

@@ -0,0 +1,20 @@
+[gd_scene format=3 uid="uid://c8swordwrap01"]
+
+[ext_resource type="PackedScene" uid="uid://xyvank512l5n" path="res://art/weapons/sword.glb" id="1_swordglb"]
+[ext_resource type="Script" path="res://systems/combat/hitbox.gd" id="2_hitbox"]
+
+[sub_resource type="CapsuleShape3D" id="CapsuleShape3D_blade"]
+radius = 0.18
+height = 1.3
+
+[node name="Sword" type="Node3D"]
+
+[node name="sword" parent="." instance=ExtResource("1_swordglb")]
+
+[node name="BladeHitbox" type="Area3D" parent="."]
+script = ExtResource("2_hitbox")
+damage_cause = "gored"
+
+[node name="CollisionShape3D" type="CollisionShape3D" parent="BladeHitbox"]
+transform = Transform3D(1, 0, 0, 0, -4.371139e-08, -1, 0, 1, -4.371139e-08, 0, 0, 0.8)
+shape = SubResource("CapsuleShape3D_blade")