Add Lovelase card widget

lib/cards/widgets/lovelace_card.dart

@@ -0,0 +1,17 @@
+part of '../../main.dart';
+
+class LovelaceCard extends StatelessWidget {
+  
+  final Widget child;
+
+  const LovelaceCard({Key key, this.child}) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    return Card(
+      child: child,
+    );
+  }
+
+
+}