Links to GitHub code source

[Kludex]

Description

You'll be able to go to your GitHub repository directly from the Logfire UI, and see the code of a logfire call or exception.

Please let us know if you are interested in this, so we can prioritize it.

[Kludex]

Documented here: https://logfire.pydantic.dev/docs/guides/advanced/link-to-code-source/

[alexmojaki]

This still needs correcting: https://logfire.pydantic.dev/docs/reference/api/logfire/#logfire.CodeSource.root_path

Something like #451 (comment)

[Kludex]

This is implemented, and @alexmojaki 's comment above was corrected.