Add Face Verification API with FastAPI

[AhmedYasserrr]

• Added FastAPI server (api.py) for face verification.
• Implemented Verifier class (verifier.py) for model loading and verification.
• Introduced distance_utils.py for metric calculations with support for cosine similarity, Euclidean distance, and others.
• Enhanced align.py to support multiple input types (paths, PIL images, NumPy arrays)
• Added __init__.py for face_alignment to function as expected
• Updated README.md with API usage.
• Fixed requirements.txt (pytorch to torch) and added API requirements.