🚧 feat: add basic copy button to codeblocks

static/js/copy_button.js

@@ -0,0 +1,19 @@
+function changeIcon(copyDiv, className) {
+    copyDiv.classList.add(className);
+    setTimeout(() => copyDiv.classList.remove(className), 2500);
+}
+
+document.querySelectorAll("pre").forEach((block) => {
+    const copyDiv = document.createElement("div");
+    copyDiv.className = "copy-code";
+    block.prepend(copyDiv);
+
+    copyDiv.addEventListener("click", function () {
+        const code = block.innerText;
+        navigator.clipboard.writeText(code).then(() => {
+            changeIcon(copyDiv, "checked");
+        }, () => {
+            changeIcon(copyDiv, "error");
+        });
+    });
+});