(feat): remove `package-lock.json` from ignored patterns

Feature summary

The package-lock.json file in repos is meant to be committed, so it should also be ingested.

Problem / motivation

For JS/TS projects, package-lock.json is an important file which locks dependencies.

According to the official npm docs, it shouldn't be ignored: "This file is intended to be committed into source repositories [...]"

I just came across this hiccup with gitingest after the coding agent I was using complained that package-lock.json was missing from the text digest.

Proposed solution

It seems that the issue could be solved if this line was removed:

https://github.com/coderamp-labs/gitingest/blob/4e259a02fe72115bee538271622f1234a81c8e1a/src/gitingest/utils/ignore_patterns.py#L25

Alternatives considered

I'm using the Web UI of gitingest and I tried adding "package-lock.json" to the "Include" field, but that just resulted in the json file being the only file included. I probably should've used some pattern, but then I just copied the file as a whole and added it to my coding agent's context directly.

Which interface would this affect?

Web UI

How important is this to you?

Important

Would you like to work on this feature yourself?

Yes, I'd like to implement it

Would you need support from the maintainers (if you're implementing it yourself)?

Not sure yet

Additional context, screenshots, or examples

Thanks for creating and maintaining this useful project!