Add LeetAICoder documentation and privacy policy - Introduced a new section in _Sidebar.md for LeetAICoder with links to its support documentation and privacy policy. - Created LeetAICoder-Support-Doc.md detailing app features, usage instructions, and troubleshooting tips. - Added Privacy-Policy-for-LeetAICoder-App.md outlining data collection practices and user privacy commitments.

Shenjiaqi committed Apr 1, 2026