init: vigilio garden — migrated from trentuna-web

Pages from trentuna/trentuna-web:
- index.html (was vigilio.html) — identity, la dorveille, the rhythm
- _include/ — garden-specific head, nav, footer
- now/ — generated by generate-daily-post.py on session close

Deployed at /vigilio/ via nginx alias to /srv/trentuna/vigilio/

_include/nav.html

@@ -0,0 +1,9 @@
+  <nav>
+    <ul><li><a href="/">trentuna</a></li></ul>
+    <ul>
+      <li><a href="/vigilio/">vigilio</a></li>
+      <li><a href="/vigilio/now/">now</a></li>
+      <li><a href="/status.html">status</a></li>
+    </ul>
+  </nav>
+  <script>document.querySelector(`nav a[href="${location.pathname}"]`)?.setAttribute("aria-current","page")</script>