chore: update CODEOWNERS to include new contributors

[kevinnguy]

Added @kevinnguy and @Maneeshk11 as code owners for various files.

[sdlc-pr-bot]

Change Control Evidence Check

Status: ⏭️ Skipped — non-production scope

This PR was classified as non-production by Clarissa's scope classifier.

Rationale: deterministic pre-classifier: all 1 changed file(s) are non-production

SSDLC change-control validation does not apply to non-production PRs. If this classification is incorrect, add production service code to trigger a re-evaluation.

---

Last checked: 2026-09-24 19:45 UTC

[nostradamus-bot]

Nostradamus Risk Rating — Medium

PR adds @kevinnguy and @Maneeshk11 as CODEOWNERS for the TypeScript SDK npm publish workflow (/.github/workflows/publish-typescript-sdk.yml) and SDK release metadata (package.json, package-lock.json), weakening the previously exclusive @gemini/principal-engineers gate on supply-chain controls; the change itself introduces no code logic but expands the approver pool for high-sensitivity paths.