Add Gitstar - Social feed for GitHub developers

[0xconal]

Adding Gitstar to the GitHub tools section.

Gitstar adds a social layer to GitHub. You follow developers, get a feed of what
they're starring and shipping, and discover repos through people you trust rather
than algorithms. Think of it as a dev-focused social network that runs on GitHub data.

Site: https://gitstar.ai?utm_medium=github_readme&utm_source=awesome_list&utm_campaign=github_awesome-copilot

[github-actions]

⚠️ This PR targets main, but PRs should target staged.

The main branch is auto-published from staged and should not receive direct PRs.
Please close this PR and re-open it against the staged branch.

You can change the base branch using the Edit button at the top of this PR,
or run: gh pr edit 1332 --base staged

[aaronpowell]

It looks like you've incorrectly branched from the main branch not staged, and as a result all the materialised plugins are included in this PR.

You can attempt to fix this with a rebase:

git fetch origin staged
git rebase --onto origin/staged origin/main <branch name>
git push --force-with-lease

If that does not resolve it, you can run npm run plugin:clean which will delete the materialised plugins and you can commit that change.