Improve BRABUS footer and SEO copy

[alanw707]

Summary

• Update footer about copy with stronger BRABUS-focused SEO wording
• Update home meta title/description and Organization schema description to match the BRABUS positioning

Checks run locally

• npm run lint:css ✅
• npm run lint:js ✅
• npm run build ✅
• PHP syntax check not run locally: php binary is not installed in this container; GitHub Actions will run it.