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/src/components/N8nTooltip/Tooltip.vue

@@ -1,13 +1,18 @@
 <template>
 	<el-tooltip v-bind="$attrs">
 		<template v-for="(_, slotName) in $slots" #[slotName]>
-			<slot :name="slotName"/>
-			<div :key="slotName" v-if="slotName === 'content' && buttons.length" :class="$style.buttons" :style="{ justifyContent: justifyButtons }">
+			<slot :name="slotName" />
+			<div
+				:key="slotName"
+				v-if="slotName === 'content' && buttons.length"
+				:class="$style.buttons"
+				:style="{ justifyContent: justifyButtons }"
+			>
 				<n8n-button
-						v-for="button in buttons"
-						:key="button.attrs.label"
-						v-bind="button.attrs"
-						v-on="button.listeners"
+					v-for="button in buttons"
+					:key="button.attrs.label"
+					v-bind="button.attrs"
+					v-on="button.listeners"
 				/>
 			</div>
 		</template>
@@ -15,9 +20,9 @@
 </template>
 
 <script lang="ts">
-import Vue, { PropType } from "vue";
+import Vue, { PropType } from 'vue';
 import ElTooltip from 'element-ui/lib/tooltip';
-import type { IN8nButton } from "@/types";
+import type { IN8nButton } from '@/types';
 import N8nButton from '../N8nButton';
 
 export default Vue.extend({
@@ -31,7 +36,19 @@ export default Vue.extend({
 		justifyButtons: {
 			type: String,
 			default: 'flex-end',
-			validator: (value: string): boolean => ['flex-start', 'flex-end', 'start', 'end', 'left', 'right', 'center', 'space-between', 'space-around', 'space-evenly'].includes(value),
+			validator: (value: string): boolean =>
+				[
+					'flex-start',
+					'flex-end',
+					'start',
+					'end',
+					'left',
+					'right',
+					'center',
+					'space-between',
+					'space-around',
+					'space-evenly',
+				].includes(value),
 		},
 		buttons: {
 			type: Array as PropType<IN8nButton[]>,