docs: overhaul homepage with tools bar, tabbed install, and professional polish

- Replace text-only platform list with styled color-coded tool badges
- Each badge links to the relevant install section
- Add tabbed Quick Install section (Claude Code / Codex / Gemini / Cursor)
- Restructure 'What's Inside' grid: skills, agents, personas, orchestration, tools, plugins, commands, multi-tool
- Rename 'POWERFUL' to 'Advanced' in domain cards
- Add tools-bar CSS with per-tool brand colors and hover effects
- Mobile-responsive tool badges
- Broaden site_name: 'Agent Skills' (not just Claude Code)
- Fix edit_uri: edit/main/docs/ (was missing docs/ prefix)
- Build verified: 238 sitemap URLs, all new pages included

mkdocs.yml

@@ -1,10 +1,10 @@
-site_name: Claude Code Skills & Plugins
+site_name: Agent Skills — Skills, Agents & Personas for AI Coding Tools
 site_url: https://alirezarezvani.github.io/claude-skills/
 site_description: "177 production-ready skills, 16 agents, 3 personas, and an orchestration protocol for 11 AI coding tools. Reusable expertise for engineering, product, marketing, compliance, and more."
 site_author: Alireza Rezvani
 repo_url: https://github.com/alirezarezvani/claude-skills
 repo_name: alirezarezvani/claude-skills
-edit_uri: edit/main/
+edit_uri: edit/main/docs/
 copyright: "Built by Alireza Rezvani"
 
 theme: