Rewrite

[cathaypacific8747]

We are rewriting the project to be more modular and typed. Since there will be significant breaking changes, commits will be added in the dev branch and merged into master once stabilised.

todo:

• Use uv (modern package manager)
• make web and era5 optional dependencies
• Use ruff (linting)
• Use mkdocs
• Use types whenever possible, check with mypy
• update testing
• do not hardcode cache paths #63
• replace staticmethods in Calculation, Unit, Nav to pure functions
• Performance should not store Bada
• split god objects
• Use fastapi
  • update client: use simple REST calls instead of socketio (to automatically generate an OpenAPI spec and make
    debugging much easier)
  • remove code duplication
• drop requirement for conda
• migrate yarn to npm
• update docs

non-goals:

• integrate with https://github.com/cathaypacific8747/fr24

some notes:

• makes heavy use of structure-of-arrays (Traffic, Autopilot)
• Environment responsible for many tasks: simulation, socket IO, file IO.
• Aircraft doesn't hold its own data, but acts as a pointer/slice to the arrays inside Traffic
  • dangling pointers when public Traffic.del_aircraft() is called
• environment spawned on socketio run_simulation signal