Consolidate examples into unified production config with static CSS

- New sqlite_serve.conf: all features on single port 8080
- New zenburn.css: hex color palette, all styles in one cacheable file
- New Zenburn templates: header/footer/card partials
- New start.sh: unified launcher with all endpoint docs
- Removed 3 separate example configs and start scripts

15 files changed, 980 insertions(+), 258 deletions(-)

server_root/global_templates/zenburn_footer.hbs

@@ -0,0 +1,9 @@
+    </main>
+    <footer>
+        <p>sqlite-serve v0.1.0</p>
+        <p>Rust + NGINX + SQLite + Handlebars</p>
+        <p>45 tests | Type-safe | Read-only</p>
+    </footer>
+</body>
+</html>
+