wip(js): add head.html and assets/js

assets/js/post.js

@@ -0,0 +1,20 @@
+import { basic, initTopbar, initSidebar } from './modules/layouts';
+
+import {
+  loadImg,
+  imgPopup,
+  initLocaleDatetime,
+  initClipboard,
+  initToc,
+  loadMermaid
+} from './modules/components';
+
+loadImg();
+initToc();
+imgPopup();
+initSidebar();
+initLocaleDatetime();
+initClipboard();
+initTopbar();
+loadMermaid();
+basic();