[Build Cleanup & Fix] Bump to version 1.0.1

[DEKHTIARJonathan]

Hi @zzyztyy thanks for your cool package.

There are a few issues with your packaging system / repo that I fixed

• No gitignore

  • .egg-info folder included
  • dist included
  • pyc files included
  • pycache included
  • dist/ folder included (should not be versioned under git)

• build using setup.py is deprecated (and you don't need it) and leads to error IGRF14 is not included in your latest release

    with open(filename) as f:
         ~~~~^^^^^^^^^^
FileNotFoundError: [Errno 2] No such file or directory: '/workspace/.venv/lib/python3.13/site-packages/pyIGRF/src/igrf14coeffs.txt'

I fixed all these problems, added flit as a build backend to make your life easier.

# Build
pip install flit
flit build

# Install 
pip install -e .

Also added config to uv if you ever want to switch.

As the current package 1.0.0 is broken (does not contain igrf14coeffs) - I bumped the version to 1.0.1 so that you can do another proper release ;)

Let me know if you have any question - happy to help

[DEKHTIARJonathan]

@zzyztyy any update ? would be nice to get a fixed released