feat: Ingest PR diffs through .diff url

[cyclotruc]

Stumbled upon this comment in this reddit post: https://www.reddit.com/r/opensource/comments/1htzl4r/pull_request_ingest_turn_any_github_pr_into_a/

Made me think: we could easily add the support for PRs
example:

For
https://github.com/cyclotruc/gitingest/pull/153
We can fetch
https://github.com/cyclotruc/gitingest/pull/153.diff

And return the diff as a digest
I would actually use this feature a lot when reviewing PRs!

Opening this issue in case someone wants to take a stab at it before I do it myself!
feel free to comment if you want to work on this, and reach out to me on discord if you need any help

[ruancomelli]

Hey @cyclotruc!

I'd like to give this a try.
This would be my first contribution to this project, and I still don't understand the codebase entirely.

From what it seems, there is no need to change frontend nor CLI code.

Should the return values of

gitingest/src/gitingest/repository_ingest.py

Lines 13 to 20 in ecaee49

	async def ingest(
	source: str,
	max_file_size: int = 10 * 1024 * 1024, # 10 MB
	include_patterns: set[str] | str | None = None,
	exclude_patterns: set[str] | str | None = None,
	branch: str | None = None,
	output: str | None = None,
	) -> tuple[str, str, str]:

include only files that were changed in the PR?

Also, you mentioned:

I would actually use this feature a lot when reviewing PRs!

... what would be the desired output here?

[ruancomelli]

I now have a draft PR open here: #166.
Note that it is still not ready for merge.