WIP: Feat/local submissions

[S1ro1]

Description

An addition to bot functionality, acting as a simple rest api to support local submissions via a cli cli.

The changes make bot.py code a bit ugly, but should be able to clean it up a bit.
An example of how the cli could work: example

Also would require future changes on more places (CLI and bot together), but I made the cli in ~45minutes of my time so maintanance of that shouldn't be too harsh.

Checklist

Before submitting this PR, ensure the following steps have been completed:

• Run the slash command /verifyruns on your own server.
  • Run the cluster bot on your server:

    python discord-bot.py

  • Start training runs with the slash command /verifyruns.
  • Verify that the bot eventually responds with:

    ✅ All runs completed successfully!
    

    (It may take a few minutes for all runs to finish. In particular, the GitHub
    runs may take a little longer. The Modal run is typically quick.)
    For more information on running a cluster bot on your own server, see
    README.md.