Summary by cubic

Add a root CODEOWNERS rule to assign all files to @jasonsaayman, enabling automatic review requests and clear default ownership.

Description

• Adds .github/CODEOWNERS with * @jasonsaayman.
• Sets a single default owner for all paths to streamline reviews.

Docs

• No user-facing docs needed.
• Future owners can add path-specific rules in the same file.

Testing

• No tests added; none needed for a GitHub metadata configuration change.

^{Written for commit 4192696. Summary will update on new commits.}