fix(docs): regenerate skill docs to fix stale cross-links, add tool-search to sidebar

[yapsrubricsz0]

Problem

Auto-generated skill documentation pages had stale cross-links to skills that had been:

• Moved from bundled to optional (pixel-art, baoyu-comic, subagent-driven-development)
• Renamed or removed entirely (native-mcp, webhook-subscriptions, debugging-hermes-tui-commands, media-spotify)
• The tool-search feature page was orphaned — present in the filesystem but not registered in the sidebar

Solution

Re-ran the skill doc generator (website/scripts/generate-skill-docs.py) which:

• Rebuilds the skill index from the current SKILL.md files, cross-referencing existing skills
• Skills that no longer exist are rendered as plain code references instead of broken links
• Skills that moved to optional now link to their correct optional/ path

Additionally added tool-search to the sidebar under Features → Core, right after tools.

Testing

• Verified generator output: confirmed broken link targets like /docs/user-guide/skills/bundled/mcp/mcp-native-mcp are now rendered as plain code references
• Verified moved skills like pixel-art now link to /docs/user-guide/skills/optional/creative/creative-pixel-art
• Verified user-guide/features/tool-search is now listed in the Features → Core sidebar section

[teknium1]

Merged via PR #49914 (docs salvage cluster). Your commit was cherry-picked onto current main with your authorship preserved in git log — merged with rebase so it lands under your name. Thanks for the contribution! Note: your commit was authored under a generic ubuntu@localhost.localdomain identity, so we re-authored it to your GitHub account to credit you correctly.