chore(packages): move the packages to root

core/src/components/item-group/item-group.tsx

@@ -0,0 +1,14 @@
+import { Component } from '@stencil/core';
+
+
+@Component({
+  tag: 'ion-item-group',
+  styleUrls: {
+    ios: 'item-group.ios.scss',
+    md: 'item-group.md.scss'
+  },
+  host: {
+    theme: 'item-group'
+  }
+})
+export class ItemGroup {}