refactor(input): split TextInput and ItemInput components

Make it easier to start adding other inputs, like select

ionic/components/item-input/test/fixed-inline-labels/index.ts

@@ -0,0 +1,7 @@
+import {App} from 'ionic/ionic';
+
+
+@App({
+  templateUrl: 'main.html'
+})
+class E2EApp {}