Range formatting support

[MichaReiser]

Summary

This PR implements support for range formatting for Python files. It requires astral-sh/ruff#9733

Note to myself: Writing Python is hard 😅

Closes #116
Closes astral-sh/ruff-vscode#319

Limitations

Range formatting Notebooks isn't supported because it raises a few interesting questions:

• Should the range be relative to the concatenated cell content?
• Should the range use a custom notation cell:offset
• What if the range falls on the boundary of two cells?

I feel like implementing range formatting will be straightforward with a Rust LSP because:

• We can make the assumption that only ever a single cell gets formatted (solves some of the problems above)
• We can directly call into the range formatting API without having to find the proper CLI abstractions.

I tried to teach VS Code that Range formatting isn't supported for notebooks by using a textSelector but VS code doesn't seem to care :(
That's why the implementation defaults to format the entire cell for now. I'm open to suggestions.

Test Plan

• Added tests
  Screencast from 2024-01-31 16-11-40.webm

[dhruvmanila]

This is unfortunate because as a user I wouldn't expect that "Format selection" in Jupyter notebook would format an entire cell. I'm not sure what the right solution is but I'd prefer to send a info / warning message to the user stating that range formatting isn't yet supported for Jupyter Notebooks instead.

[MichaReiser]

I agree but I wasn't able to come up with something better. I'm worried that a warning would be rather annoying and force users to change their setting from modificationsIfAvailable to the entire document or they get annoyed by the warning on every save