feat(default-app): Simplify charm list UI by renaming to "Patterns" and removing table headers

Changed the main heading from "Charms (N)" to just "Patterns" to better
reflect the pattern-centric nature of the system. Removed the table header
row ("Charm Name" and "Actions") for a cleaner, more minimal UI that lets
the content speak for itself.

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

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

Author: Tony Espinoza

packages/patterns/default-app.tsx

@@ -170,15 +170,9 @@ export default recipe<CharmsListInput, CharmsListOutput>(
 
           <ct-vscroll flex showScrollbar>
             <ct-vstack gap="4" padding="6">
-              <h2>Charms ({allCharms.length})</h2>
+              <h2>Patterns</h2>
 
               <ct-table full-width hover>
-                <thead>
-                  <tr>
-                    <th>Charm Name</th>
-                    <th>Actions</th>
-                  </tr>
-                </thead>
                 <tbody>
                   {allCharms.map((charm) => (
                     <tr>