[ZouR-Ma]

Problem

Contributors need a clear project-wide guide to coordinating work, implementing changes, and submitting them for internal review.

Changes

• Add contribute.md as an English contribution guide for the entire project.
• Cover issue ownership, development preparation, focused commits, validation, collaborator access, and internal review and merge requirements.
• Link the repository's authoritative contribution rules, development and testing guides, security policy, and PR template.
• Use maintainer coordination and GitHub Issues for community-reported problems.

Behavior and compatibility

Documentation only; no runtime behavior or public interfaces change. CONTRIBUTING.md remains authoritative. Repository access policy is distinguished from actual settings that maintainers must verify.

Validation

On macOS with Node.js v24.3.0 and pnpm 9.15.9:

• npm run check: passed, with no tracked formatter changes.
• TMPDIR=/tmp ./test.sh: passed across the repository. A short temporary path avoids the macOS tsx IPC socket path-length limitation encountered in the previous version.
• Python checks of relative Markdown links and English project-wide wording: passed.
• git diff --cached --check: passed.

Limitations

GitHub CI and internal maintainer approval are pending. Repository permission and branch protection settings were not audited.

Replaces #272 using the renamed contribution-guide branch.