Add support for microsoft-defined rate limits

[jcxldn]

I think this is more of a proof-of-concept at the moment.

To-Do

• [ ] Add 429 handling? Would it be worth logging/otherwise storing times when rate limited requests still have 429s? Would indicate where we would need to change things.

Docs

• [x] Add docstrings (properly document everything)

Tests

• [ ] Limits
  • [x] Burst only
  • [x] Sustain only (reaches burst multiple times, waits for it to reset)
  • [ ] Burst and sustain limits exceeded at the same time
  • [ ] A test with sufficient lifecycle where rate limits are reset

~~- [ ] Sorting and filtering~~

Testing python behaviour is probably not necessary.