feat: clothing lane, character sources, and DCC bridges

Bulk import of the working lanes that were living untracked on the PC.

Content:
- characters/  Lena/male body lanes, bakes, texture work, run logs
- clothing/    garment pipeline, configs, gates, contract docs
- garments/    MD-authored garment sources (.zprj/.zpac)
- UAL-Lib/     Universal Animation Library 2 source (.blend/.fbx/.glb)
- tools/       blender_bridge, iclone_bridge, md_bridge, tailor, glm_agent
- docs/, plans/, dev/, .agents/plans/

Repo hygiene:
- .gitattributes: LFS now covers .blend, .zprj, .zpac, .obj, .npy and the
  Reallusion .iAvatar/.ccAvatar/.ccRestore containers. Without this the
  ~3.8 GB in this commit would land as raw blobs. .png/.jpg are left out
  on purpose — ~250 are already tracked raw and converting them would
  rewrite every one without shrinking history.
- .gitignore: exclude /accurig/ (~1 GB AccuRig program files, redistributable
  from Reallusion, nothing authored here) and /dev/null/ (git-lfs hook copies
  dropped by a `>/dev/null` redirect on Windows).

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

clothing/configs/tests/extends_child.json

@@ -0,0 +1,29 @@
+{
+  "extends": "tests/extends_parent.json",
+  "name": "extends_child",
+
+  "weld_threshold": 0.0009,
+
+  "align": {
+    "z_nudge": 0.042,
+    "xy_nudge": [0.01, 0.0]
+  },
+
+  "parts": {
+    "Skirt": {
+      "islands": [2],
+      "fit": { "offset_mm": 7 }
+    },
+    "Belt": {
+      "slot": "Body",
+      "islands": [3],
+      "tris": 600
+    }
+  },
+
+  "export": { "set": "TestSetChild" },
+
+  "catalog": { "displayName": "Child Skirt" },
+
+  "_note": "Fixture for garment.py --selftest ONLY. Exercises: scalar override (weld_threshold), object merge-per-key (align.z_nudge overrides while top_bone/scale_* survive), array-replaces-whole (align.xy_nudge, parts.Skirt.islands), nested part override (parts.Skirt.fit.offset_mm changes, fit.mask survives), part addition (Belt), and inheritance of everything untouched."
+}