Add face-sort pipeline as the repo's base

Single-file CLI (embed / cluster / refine) using InsightFace buffalo_l
embeddings and agglomerative clustering, migrated in from the ad-hoc
/home/peter/face_sort/ directory so this repo is the canonical home for
faceset preparation feeding roop-unleashed and similar tools.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,5 @@
+work/
+__pycache__/
+*.pyc
+.venv/
+.claude/