[aolingge]

Summary

• Add a concise project guide to the shared community README.
• Add the new visual identity and direct project-directory entry point.

Verification

• git diff --check
• Profile and public project documentation link audit: 435 targets, 99 new targets, 0 problems.
• External project smoke checks: four linked sites returned HTTP 200.

This pull request changes documentation and a decorative image only; it does not change templates, workflows or permissions.