Add Vue

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

.browserslistrc

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+> 1%
+last 2 versions
+not ie <= 8

.eslintrc.js

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+module.exports = {
+  root: true,
+  env: {
+    node: true
+  },
+  'extends': [
+    'plugin:vue/essential',
+    'eslint:recommended'
+  ],
+  rules: {
+    'no-console': process.env.NODE_ENV === 'production' ? 'error' : 'off',
+    'no-debugger': process.env.NODE_ENV === 'production' ? 'error' : 'off'
+  },
+  parserOptions: {
+    parser: 'babel-eslint'
+  }
+}

babel.config.js

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+module.exports = {
+  presets: [
+    '@vue/app'
+  ]
+}

js/App.vue

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+<template>
+	<div id="content" class="app-mail">
+		<div id="app-navigation" class="icon-loading">
+			<div id="mail-new-message-fixed"
+				 class="app-navigation-new">
+			</div>
+			<ul id="usergrouplist"></ul>
+			<div id="app-settings">
+				<div id="app-settings-header">
+					<button class="settings-button"
+							data-apps-slide-toggle="#app-settings-content"><?php p($l->
+						t('Settings'));?>
+					</button>
+				</div>
+				<div id="app-settings-content"></div>
+			</div>
+		</div>
+		<div id="app-content">
+			<div id="app-content-wrapper"></div>
+		</div>
+	</div>
+</template>
+
+<script>
+	export default {}
+</script>
+
+<style>
+
+</style>