chore: remove broken oauth-tests.ts and fix remote-auth-tests.ts

[ichoosetoaccept]

Summary

Cleans up broken upstream test files:

Changes

Removed: test/oauth-tests.ts

• Imported GitLabOAuth from ../oauth.js which doesn't exist in this fork
• OAuth functionality was never ported from upstream

Fixed: test/remote-auth-tests.ts

• Removed node-fetch import (package was removed in previous PR)
• Now uses native fetch (available in Bun and Node 18+)
• Verified file runs correctly (just needs GitLab credentials)

Updated: test/README.md

• Removed all OAuth-related documentation
• Cleaned up references to deleted test file

Verification

• Build passes ✅
• All 122 unit tests pass ✅
• remote-auth-tests.ts runs with bun (requires GitLab token)

[ichoosetoaccept]

• fix: add knip config, pre-commit hook, fix Zod compatibility, and remove unused code #38
• chore: remove broken oauth-tests.ts and fix remote-auth-tests.ts #37 👈 (View in Graphite)
• chore: remove 11 unused upstream dependencies #36
• main

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[ichoosetoaccept]

Merge activity

• Dec 30, 10:00 AM UTC: A user started a stack merge that includes this pull request via Graphite.
• Dec 30, 10:01 AM UTC: Graphite rebased this pull request as part of a merge.
• Dec 30, 10:02 AM UTC: @ichoosetoaccept merged this pull request with Graphite.

[github-actions]

🎉 This PR is included in version 0.3.1 🎉

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