Add UV Python project template

[johnnygreco]

Summary

• add a minimal packaged Python project under projects/python-project-template
• manage runtime and development dependencies with uv and a committed uv.lock
• export a hash-pinned requirements.txt so nSpect can inspect resolved runtime dependencies
• include a typed Click CLI, tests with 100% coverage, Ruff, ty, packaging metadata, and usage documentation

Why

Research projects need a small, reusable starting point that is reproducible,
testable, and visible to NVIDIA dependency scanning.

Validation

• uv sync --locked
• uv run ruff format --check .
• uv run ruff check .
• uv run ty check
• uv run pytest (2 passed, 100% coverage)
• uv build
• uv lock --check
• regenerated the nSpect requirements export with uv export --locked
• git diff --check