pack: add .editorconfig and use tab instead of space

src/renderer/components/layout/DefaultLayout.vue

@@ -3,12 +3,12 @@ import HeaderLayout from '@/renderer/components/layout/HeaderLayout.vue'
 </script>
 
 <template>
-  <v-app>
-    <v-layout>
-      <HeaderLayout />
-      <v-main>
-        <slot />
-      </v-main>
-    </v-layout>
-  </v-app>
+	<v-app>
+		<v-layout>
+			<HeaderLayout />
+			<v-main>
+				<slot />
+			</v-main>
+		</v-layout>
+	</v-app>
 </template>