Move a bunch of scripts and CSS to assets so they can be processed with Hugo Pipes

Use Pipes to fingerprint and add SLI information to <script> and <link> tags.

assets/scripts/site.js

@@ -0,0 +1,25 @@
+/* site.js
+ * Eryn Wells <eryn@erynwells.me>
+ */
+
+window.addEventListener("DOMContentLoaded", () => {
+  const siteHeader = document.querySelector("header.site");
+  if (!siteHeader) {
+    return;
+  }
+  siteHeader.classList.add("visible");
+
+  siteHeader.addEventListener("animationend", () => {
+    console.log("Animation ended");
+    siteHeader.classList.add("sticky");
+  }, false);
+
+  try {
+    const documentReferrer = new URL(document.referrer);
+    if (documentReferrer.pathname === "/") {
+      siteHeader.classList.add("animated");
+    } else {
+      siteHeader.classList.add("sticky");
+    }
+  } catch { }
+});