create dashboard layout

resources/js/themes.js

@@ -0,0 +1,19 @@
+import { ref } from "vue"
+
+localStorage.setItem('themes', localStorage.getItem('themes') || JSON.stringify({
+  topbar: 'bg-cyan-500 text-gray-700 hover:bg-cyan-600 hover:text-gray-800 transition-all ease-in-out duration-150',
+  sidebar: 'bg-gray-700 text-gray-200 hover:bg-gray-800 hover:text-gray-100 transition-all ease-in-out duration-150',
+}))
+
+const themes = ref(JSON.parse(localStorage.getItem('themes')))
+
+const set = (key, val) => {
+  themes.value[key] = val
+  localStorage.setItem('themes', JSON.stringify(themes.value))
+}
+
+const get = (key, def) => themes.value[key] || def
+
+export default {
+  ...themes.value, set, get
+}