Add rtlify-ai

RTL (Right-to-Left) architecture rules for AI coding agents.

• Teaches logical CSS properties, Tailwind logical classes, bidi text safety, icon flipping, React Native RTL APIs
• Works with 7 editors: Claude Code, Cursor, Copilot, Windsurf, Cline, Gemini CLI, Codex CLI
• Zero dependencies — npx rtlify-ai init
• npx rtlify-ai check audits RTL violations
• GitHub: idanlevi1/rtlify
• npm: rtlify-ai