Create search page

lib/models/search_result.dart

@@ -0,0 +1,18 @@
+import 'package:flutter/cupertino.dart';
+
+/// Single search result
+///
+/// @author Pierre Hubert
+
+enum SearchResultKind { USER, GROUP }
+
+class SearchResult {
+  final int id;
+  final SearchResultKind kind;
+
+  SearchResult({
+    @required this.id,
+    @required this.kind,
+  })  : assert(id != null),
+        assert(kind != null);
+}