feat: ignore gitignore & bazleignore files

[Siddhant-K-code]

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fixes #33

[jdorfman]

@Siddhant-K-code the CI job is failing. Could be on our end, can you confirm?

[Siddhant-K-code]

I think, there is something wrong with the workflow.
See this

[jdorfman]

@slimsag any ideas?

[emidoots]

I think for this to be useful we would need to look at / parse the .gitignore and .bazelignore files, then ignore those files, no?

Also, I think strings.Contains would be wrong here - we should ignore these at the time we produce the index, not inside of GetIndex.

Probbaly it would need to live inside the IndexDir methods of indexers themselves

doctree/doctree/indexer/indexer.go

Line 97 in 418506c

index, err := indexer.IndexDir(ctx, dir)

but I'm not 100% sure right now, may not have much time on my end to find the best place for this.

[Siddhant-K-code]

Ah Yeah! This makes sense @slimsag

I will take a look at this 👀

[jdorfman]

Thanks @slimsag