feat(naming): dance registry + two-stage naming system; archive non-keepers

Keep aloha1(+pp), dance1(+pp), hakadance1. Archive hakadance2, alohaOG,
firedance1, hakaOG (all variants) to archive/. New dances get provisional
nd## ids at conversion; rename to a dance code (haka01 etc.) only on
adoption via tools/rename_clip.py. Registry: docs/dances/REGISTRY.md.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

tools/rename_clip.py

@@ -0,0 +1,52 @@
+"""rename_clip.py — rename the animation inside a GLB (for dance-code adoption).
+
+Used when a provisional dance (nd##) is adopted and gets its final dance code
+(see docs/dances/REGISTRY.md). Renames the clip baked into the GLB; the pack
+rename is just the output filename.
+
+Usage:
+  blender --background --python tools/rename_clip.py -- \
+    --src <in.glb> --out <out.glb> --name <NewClipName>
+"""
+import bpy, sys, argparse
+
+def parse():
+    argv = sys.argv[sys.argv.index("--")+1:] if "--" in sys.argv else []
+    p = argparse.ArgumentParser()
+    p.add_argument("--src", required=True)
+    p.add_argument("--out", required=True)
+    p.add_argument("--name", required=True)
+    return p.parse_args(argv)
+
+def main():
+    a = parse()
+    bpy.ops.wm.read_factory_settings(use_empty=True)
+    bpy.ops.import_scene.gltf(filepath=a.src)
+    arm = next(o for o in bpy.data.objects if o.type == 'ARMATURE')
+    act = arm.animation_data.action
+    if getattr(act, "slots", None) and arm.animation_data.action_slot is None:
+        arm.animation_data.action_slot = act.slots[0]
+    old = act.name
+    act.name = a.name
+
+    for t in list(arm.animation_data.nla_tracks):
+        arm.animation_data.nla_tracks.remove(t)
+    track = arm.animation_data.nla_tracks.new()
+    track.name = a.name
+    strip = track.strips.new(a.name, 0, act)
+    strip.name = a.name
+    arm.animation_data.action = None
+
+    for o in [o for o in bpy.data.objects if o.type == 'MESH']:
+        bpy.data.objects.remove(o, do_unlink=True)
+
+    bpy.ops.export_scene.gltf(
+        filepath=a.out,
+        export_animation_mode="NLA_TRACKS",
+        export_force_sampling=True,
+        export_optimize_animation_size=False,
+    )
+    print(f"[rename_clip] '{old}' -> '{a.name}'  EXPORTED {a.out}")
+
+if __name__ == "__main__":
+    main()