Add Timeline page and update nav across all pages

- New timeline.html with vertical event timeline for studio history
- Add Timeline nav link to index.html, services.html, works.html, and timeline.html

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

services.html

@@ -422,6 +422,7 @@
         <ul class="nav-links">
             <li><a href="services.html" class="active">Services</a></li>
             <li><a href="works.html">Works</a></li>
+            <li><a href="timeline.html">Timeline</a></li>
             <li><a href="index.html#about">About</a></li>
             <li><a href="index.html#contact">Contact</a></li>
         </ul>