docs: reorganize skill documentation and extend URL scheme
- Move agent-guide.md to references/agent-patterns.md
- Create references/search-strategies.md for advanced search techniques
- Add Quick Links section to SKILL.md for better navigation
- Extend fuzzy-search pane to support pre-filled search parameters
- Add initialSubstr, initialIsRegex, initialPathOnly props
- Add initialMediaType filter and autoSearch control
- Update queryActions.ts to map URL props to component props
- Make search API parameters optional (regexp, cursor, folder_paths)
- Add ai-agents.md and ai-agents-zh.md documentation
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