feat(darkmode): dark mode toggle (#82)

* feat(darkmode): initial support for dark mode toggle

* fix(darkmode): add svg icons

* feat(darkmode): dispatch onColorSchemeChange event

* add head/darkmode

* feat(darkmode); add colorScheme config

* style: remove empty line

* refactor(darkmode): simplify code

* style: add comment for darkmode config

* i18n support for dark mode toggle

* Some renaming

assets/ts/main.ts

@@ -9,6 +9,7 @@ import StackGallery from "ts/gallery";
 import { getColor } from 'ts/color';
 import menu from 'ts/menu';
 import createElement from 'ts/createElement';
+import StackColorScheme from 'ts/colorScheme';
 
 let Stack = {
     init: () => {
@@ -52,6 +53,8 @@ let Stack = {
 
             observer.observe(articleTile)
         }
+
+        new StackColorScheme(document.getElementById('dark-mode-toggle'));
     }
 }