Add GoatCounter count.js component (as goat.js), MIT license logo

(mit.svg), and htmz assets (htmz.js and htmz.dev.js). Add LICENSE file
containing this project's MIT license and 3rd-party component licenses.

public/htmz.js

@@ -0,0 +1,11 @@
+function htmz(frame) {
+  if (frame.contentWindow.location.href === "about:blank") return;
+  setTimeout(() => {
+    document
+      .querySelector(frame.contentWindow.location.hash || null)
+      ?.replaceWith(...frame.contentDocument.body.childNodes);
+    frame.contentWindow.location.replace("about:blank");
+    frame.remove();
+    document.body.appendChild(frame);
+  });
+}