feat: implement automated 3D character pipeline with retargeting and rig management tools

tools/strip_rig.py

@@ -1,5 +1,19 @@
 #!/usr/bin/env python3
 """
+DEPRECATED — do not use. Kept only to explain what it did and why it was wrong.
+
+This discarded a character's skeleton so autorig.py could refit the library one.
+It "solved" a bone-NAMING problem by destroying the asset: on Taila it cost 21
+skirt bones, ~50 hair bones, 8 limb twist bones, split 18 per-part meshes into
+one blob, and turned 17 both-legs-at-once vertices into 2817. Every runtime
+weight repair in characters/skin_leg_repair.gd exists to undo its output.
+
+The naming problem is solved properly in tools/rig_map.py, which pairs two
+skeletons by resolved ROLE instead of by name, so tools/retarget.py can move the
+animation library onto a character's own rig and keep everything. Use that.
+
+Original description follows.
+
 Strip an existing rig from a character GLB so tools/autorig.py re-rigs it on
 the animation-library skeleton.