docs: fix workflow command documentation to use correct syntax

Update all documentation to show the correct command syntax:
- `/plan`, `/review`, `/work`, `/codify` (short form, autocompletes)

Previously showed `/workflows:plan` etc. which doesn't work.
The `name:` field in frontmatter determines the short command name.

Fixes #19

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

docs/pages/skills.html

@@ -435,8 +435,8 @@ bash scripts/worktree-manager.sh cleanup</code></pre>
             </div>
             <h4>Integration</h4>
             <ul>
-              <li>Works with <code>/workflows:review</code> for isolated PR analysis</li>
-              <li>Works with <code>/workflows:work</code> for parallel feature development</li>
+              <li>Works with <code>/review</code> for isolated PR analysis</li>
+              <li>Works with <code>/work</code> for parallel feature development</li>
             </ul>
             <h4>Requirements</h4>
             <ul>