#252 Chore: Add codeowners

Summary

• Add @jerrinfrancis to CODEOWNERS
• Related: https://github.com/kubevela/community/issues/274
• Related: https://github.com/kubevela/community/pull/275

Test plan

• Confirm @jerrinfrancis is listed on owned paths
• Maintainer/reviewer approval

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Summary by cubic

Adds @jerrinfrancis to the global * entry in CODEOWNERS so GitHub auto-requests their review on all PRs. Previously their review was not requested; now all file changes include them as a code owner.

• Scope: applies to all files via *; no code, CI, or runtime changes.
• If branch protection requires code owner reviews, GitHub will request @jerrinfrancis; approval thresholds are unchanged.