docs: add missing files to "List of Documents" in contributor docs

[Khushi256]

Issue:

Fixes #3977

The "List of Documents" section in contributor_docs/README.md did not include several documentation files that currently exist in the contributor_docs directory. This could make it harder for contributors to discover all available documentation resources.

This PR updates the list to include the missing files and ensures the index accurately reflects the contents of the directory.

Demo:

N/A (Documentation-only change)

Changes:

• Added missing documentation files to the "List of Documents" section in contributor_docs/README.md.
• Ensured each document is linked properly for easier navigation.
• Improved discoverability of contributor documentation.

I have verified that this pull request:

• has no linting errors (npm run lint)
• has no test errors (npm run test)
• has no typecheck errors (npm run typecheck)
• is from a uniquely-named feature branch and is up to date with the develop branch.
• is descriptively named and links to an issue number, i.e. Fixes #123
• meets the standards outlined in the accessibility guidelines

[yugalkaushik]

Checked all the links and descriptions and they LGTM.

[raclim]

Thanks @Khushi256 and @yugalkaushik, I agree that this looks overall good to me! @Jatin24062005, please feel free to check this out as well!

[Khushi256]

Hi @Jatin24062005 ! Thanks for the suggestion , I checked the contributor_docs/README.md and all three files are actually already linked in the "List of Documents" section:

• preparing_an_issue.md -> Instructions for creating and navigating issues. (line - 13)
• public_api_proposed.md -> Proposed API extensions and design notes for future endpoints. (line - 21)
• GSOC_hinter_and_refactoring_changes.md -> Architecture overview for autocomplete hinter and refactoring systems built during GSoC 2025. (line - 24)

Let me know if I missed anything or if there's something else that needs to be added!

[Jatin24062005]

Thanks @Khushi256 for checking and clarifying — that was my oversight, I missed that these were already linked in contributor_docs/README.md.

For consistency, I’d suggest updating:

• ./testing → testing.md
• ./release.md → release.md

This will keep the file references uniform across the docs.

Apart from that, @raclim everything looks good 👍

[Khushi256]

Hi @Jatin24062005 ! I've addressed the feedback - updated ./testing.md and ./release.md to testing.md and release.md to keep the file references consistent across the docs.