feat: Add global CSS rules for the entire app, update Angular and Ion…

…ic versions and import Ionic Dark System palette

apps/demo/src/global.scss

@@ -9,20 +9,7 @@
  * https://ionicframework.com/docs/layout/global-stylesheets
  */
 
-/* Core CSS required for Ionic components to work properly */
-@import "@ionic/angular/css/core.css";
-
-/* Basic CSS for apps built with Ionic */
-@import "@ionic/angular/css/normalize.css";
-@import "@ionic/angular/css/structure.css";
-@import "@ionic/angular/css/typography.css";
-@import '@ionic/angular/css/display.css';
-
-/* Optional CSS utils that can be commented out */
-@import "@ionic/angular/css/padding.css";
-@import "@ionic/angular/css/float-elements.css";
-@import "@ionic/angular/css/text-alignment.css";
-@import "@ionic/angular/css/text-transformation.css";
-@import "@ionic/angular/css/flex-utils.css";
-
-
+/* (Optional) This is added to prevent the flashing that happens when toggling between palettes */
+ion-item {
+  --transition: none;
+}

apps/demo/src/style.scss

@@ -0,0 +1,37 @@
+/*
+ * App Global CSS
+ * ----------------------------------------------------------------------------
+ * Put style rules here that you want to apply globally. These styles are for
+ * the entire app and not just one component. Additionally, this file can be
+ * used as an entry point to import other CSS/Sass files to be included in the
+ * output CSS.
+ * For more information on global stylesheets, visit the documentation:
+ * https://ionicframework.com/docs/layout/global-stylesheets
+ */
+
+/* Core CSS required for Ionic components to work properly */
+@import '@ionic/angular/css/core.css';
+
+/* Basic CSS for apps built with Ionic */
+@import '@ionic/angular/css/normalize.css';
+@import '@ionic/angular/css/structure.css';
+@import '@ionic/angular/css/typography.css';
+
+/* Optional CSS utils that can be commented out */
+@import '@ionic/angular/css/padding.css';
+@import '@ionic/angular/css/float-elements.css';
+@import '@ionic/angular/css/text-alignment.css';
+@import '@ionic/angular/css/text-transformation.css';
+@import '@ionic/angular/css/flex-utils.css';
+@import '@ionic/angular/css/display.css';
+
+/**
+ * Ionic Dark Palette
+ * -----------------------------------------------------
+ * For more information, please see:
+ * https://ionicframework.com/docs/theming/dark-mode
+ */
+
+/* @import '@ionic/angular/css/palettes/dark.always.css'; */
+/* @import '@ionic/angular/css/palettes/dark.class.css'; */
+@import '@ionic/angular/css/palettes/dark.system.css';