feat: Implement Skills Manager View and Notifier Module

- Added `skills-manager.js` for managing Claude Code skills with functionalities for loading, displaying, and editing skills.
- Introduced a Notifier module in `notifier.ts` for CLI to server communication, enabling notifications for UI updates on data changes.
- Created comprehensive documentation for the Chain Search implementation, including usage examples and performance tips.
- Developed a test suite for the Chain Search engine, covering basic search, quick search, symbol search, and files-only search functionalities.

ccw/src/templates/dashboard.html

@@ -424,6 +424,16 @@
                 <i data-lucide="message-square" class="nav-icon"></i>
                 <span class="nav-text flex-1" data-i18n="nav.promptHistory">Prompts</span>
               </li>
+              <li class="nav-item flex items-center gap-2 mx-2 px-3 py-2.5 text-sm text-muted-foreground hover:bg-hover hover:text-foreground rounded cursor-pointer transition-colors" data-view="skills-manager" data-tooltip="Skills Management">
+                <i data-lucide="sparkles" class="nav-icon"></i>
+                <span class="nav-text flex-1" data-i18n="nav.skills">Skills</span>
+                <span class="badge px-2 py-0.5 text-xs font-semibold rounded-full bg-hover text-muted-foreground" id="badgeSkills">0</span>
+              </li>
+              <li class="nav-item flex items-center gap-2 mx-2 px-3 py-2.5 text-sm text-muted-foreground hover:bg-hover hover:text-foreground rounded cursor-pointer transition-colors" data-view="rules-manager" data-tooltip="Rules Management">
+                <i data-lucide="book-open" class="nav-icon"></i>
+                <span class="nav-text flex-1" data-i18n="nav.rules">Rules</span>
+                <span class="badge px-2 py-0.5 text-xs font-semibold rounded-full bg-hover text-muted-foreground" id="badgeRules">0</span>
+              </li>
             </ul>
           </div>