- Reorganize Quick Start section to showcase 6 popular repositories with copy-paste examples
- Remove duplicate 'Popular Public Repositories' section
- Consolidate Installation Workflow and Usage Examples for clarity
- Add suurt8ll/open_webui_functions to popular collection list
- Update both English and Chinese documentation with consistent formatting
- Sync documentation mirrors to docs/plugins/
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>