[2.6.0] Remove feedback-codifier agent, update docs theme and style

- Remove feedback-codifier agent from workflow agents (24 → 23 agents)
- Update all component counts across plugin.json, README, and docs site
- Update docs CSS theme (hue: 243, saturation: 1, contrast: 0.71)
- Apply Every style guide fixes (number formatting: "2" → "two", etc.)
- Add v2.6.0 changelog entry to docs site

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

plugins/compounding-engineering/docs/pages/skills.html

@@ -33,7 +33,7 @@
         <div class="nav-section">
           <h3>Reference</h3>
           <ul>
-            <li><a href="agents.html">Agents (24)</a></li>
+            <li><a href="agents.html">Agents (23)</a></li>
             <li><a href="commands.html">Commands (13)</a></li>
             <li><a href="skills.html" class="active">Skills (11)</a></li>
             <li><a href="mcp-servers.html">MCP Servers (2)</a></li>