Add pyproject and README

[seofernando25]

Would be nice to use a proper project file and lock files so that we are all on the same version.

• Added pyproject.toml and a lock file.
• You can see how you could use it from here.

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Note

Introduces project configuration with dependencies and lockfile, documents install/usage with uv, and sets Python to 3.14.

• Tooling/Build:
  • Add pyproject.toml with project metadata, Python >=3.14, and deps (numpy, scipy, matplotlib, pymap3d).
  • Add uv.lock to lock transitive dependencies.
  • Add .python-version pinning Python to 3.14.
• Docs:
  • New README.md with installation (uv sync) and usage (uv run flight_sim.py).

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