chore: demo app

Author: NathanWalker

apps/demo/src/app.scss

@@ -1,2 +1,6 @@
 @import 'nativescript-theme-core/scss/light';
-@import 'nativescript-theme-core/scss/index';
+@import 'nativescript-theme-core/scss/index';
+
+.rounded {
+  border-radius: 20;
+}

apps/demo/src/main-page.xml

@@ -5,7 +5,7 @@
   <StackLayout class="p-20">
     <ScrollView class="h-full">
       <StackLayout>
-        <Button text="add a package first" tap="{{ viewDemo }}" class="btn btn-primary view-demo"/>
+        <Button text="add a package first" tap="{{ viewDemo }}" class="btn btn-primary rounded view-demo"/>
       </StackLayout>
     </ScrollView>
   </StackLayout>