feat: implement dynamic Eleventy tiling blog, modular CSS, and agent customizations

- Add project foundation README.md and root AGENTS.md for pair programming
- Configure .agents/ rules and skills for Eleventy tiling and Obsidian publishing
- Decompose monolithic styles into modular tokens, reset, layout, and component CSS
- Implement Nunjucks layout inheritance (base.njk, post.njk, page.njk) and reusable partials
- Configure Eleventy 3 with markdown-it-anchor, syntax highlighting, and dynamic collections
- Migrate sample prototypes into dynamic dispatches lander, gateway, and Markdown posts
- Add multi-stage Dockerfile and clean-URL nginx.conf for production serving

src/_includes/partials/footer.njk

@@ -0,0 +1,13 @@
+<footer class="footer-tile" aria-label="Global Footer">
+  <div class="footer-left">
+    <span class="status-indicator"></span>
+    <span>RUNTIME: ELEVENTY 3.x STATIC</span>
+    <span>&bull;</span>
+    <span>THEME: NATIVE TERMINAL DARK</span>
+  </div>
+
+  <div class="footer-right">
+    <span>&copy; {{ currentYear or "2026" }} {{ site.author }}</span>
+    <a href="https://git.rooks.dev" target="_blank" rel="noopener noreferrer" class="footer-link">Source Forge ↗</a>
+  </div>
+</footer>