Add gif doc

Author: victorbotamedi

README.md

@@ -11,8 +11,18 @@ and the Flutter guide for
 [developing packages and plugins](https://flutter.dev/developing-packages). 
 -->
 
-A highly customizable widget to render JSON objects.
-
+A highly customizable widget to render and interact with JSON objects.
+
+[Provider](doc/interaction.mp4)
+
+<!-- TODO: change branch links /docs -->
+<p>
+  <img src="https://github.com/rows/json-data-explorer/blob/doc/doc/interaction.gif?raw=true"
+   alt="An animated image of the json widget interaction" height="400"/>
+  &nbsp;&nbsp;&nbsp;&nbsp;
+  <img src="https://github.com/rows/json-data-explorer/blob/doc/doc/search.gif?raw=true"
+   alt="An animated image of the search capabilities" height="400"/>
+</p>
 
 ## Features