feat: markdown rendering /m/<id>

static/js/markdown.js

@@ -0,0 +1,22 @@
+const homePage = document.location.origin;
+
+function rawClicked() {
+    window.location = homePage + '/' + PASTE_ID;
+}
+
+async function forkClicked() {
+    const response = await fetch(homePage + '/' + PASTE_ID);
+    const text = await response.text();
+    localStorage["forkText"] = text;
+    window.location = homePage;
+}
+
+function newPasteClicked() {
+    window.location = homePage;
+}
+
+function themeChanged(theme) {
+    const url = new URL(window.location.href);
+    url.searchParams.set('theme', theme);
+    window.location = url.toString();
+}