feat: FastAPI endpoints — POST /guide/recommend and /guide/score (Closes #10)

[laurentketterle-hub]

Implements FastAPI endpoints for PoseGuide #10 (50 MRG).

Files added:

• poseguide/api.py — FastAPI application with:
  • POST /guide/recommend — Tag-based pose recommendations with Jaccard similarity
  • POST /guide/score — Pose alignment scoring with per-joint analysis
  • GET /health — Health check endpoint
  • Pydantic models for request/response validation
  • 15 mock poses across yoga, fitness, office, dance, studio categories

Run:

pip install fastapi uvicorn
uvicorn poseguide.api:app --reload

Example:

curl -X POST http://localhost:8000/guide/recommend \
  -H "Content-Type: application/json" \
  -d '{"tags": ["yoga", "standing"], "count": 3}'