[WIP] Vectorized `tess-point` in Python

[christinahedges]

Hi @christopherburke, this is a first PR to make tess-point a faster tool that's easier to use in Python. This is absolutely a work in progress (WIP) and there's lots missing from this PR right now! At the moment there is functionality to go from Pixels -> RA/Dec, and not the other way around. I need to implement that!

This PR has big changes to the API, and so I incremented the major version number. I changed the package structure around to make it easier to maintain, and added the first test of a few.

I'll open this now, and we can talk here about how to move forward!

To Do

• [ ] Add docstrings and comments
• [ ] Implement star_in_fov, optics_fp, make_az_asym, mm_to_pix, radec2pix
• [ ] Add functions tess_stars2px_reverse_function_entry and tess_stars2px_function_entry with deprecation warnings
• [ ] Ensure command line functions work
• [ ] Ensure WASM functionality is included