[Feature] Enable Python formatting

[dev-rowbot]

Since the Tiltfile itself is written in Python it would be nice build in support for a "editor.defaultFormatter".

For now I found myself switching the Tiltfile language to Python, formatting, and then switching back in VSCode. I'm not sure if there is better way to do this.

I tried adding this to my settings.json but it does not see to help

    "[tiltfile]": {
        
        "editor.defaultFormatter": "ms-python.python"
    },

[wuleninja]

Hi! Thanks for this nice extension! Formatting would be very nice indeed. Any solution?