ci: Ensure that eslint runs on all frontend code (no-changelog) (#4602)

* ensure that eslint runs on all frontend code

* remove tslint from `design-system`

* enable prettier and eslint-prettier for `design-system`

* Delete tslint.json

* use a single editorconfig for the repo

* enable prettier for all code in `design-system`

* more linting fixes on design-system

* ignore coverage for git and prettier

* lintfix on editor-ui

packages/design-system/.storybook/main.js

@@ -14,7 +14,7 @@ module.exports = {
 				postcssLoaderOptions: {
 					implementation: require('postcss'),
 				},
-			}
+			},
 		},
 		'storybook-addon-designs',
 		'storybook-addon-themes',

packages/design-system/.storybook/storybook.scss

@@ -1,11 +1,11 @@
-@use "./fonts.scss";
+@use './fonts.scss';
 
-@use "~/src/css/base.scss" with (
-	$font-path: '~element-ui/lib/theme-chalk/fonts',
+@use '~/src/css/base.scss' with (
+	$font-path: '~element-ui/lib/theme-chalk/fonts'
 );
 
-@use "~/src/css/reset.scss";
-@use "~/src/css/index.scss";
+@use '~/src/css/reset.scss';
+@use '~/src/css/index.scss';
 
 .multi-container > * {
 	margin-bottom: 10px;