added npg lite on main page

Author: Harshit Mishra

index.rst

@@ -36,6 +36,16 @@ that you can use with our hardware.
     :margin: 4 4 0 0 
     :gutter: 2
 
+    .. grid-item::
+        
+        .. card:: 
+            :link: neuro-play-ground-lite
+            :link-type: ref
+            :img-top: media/neuro-playground-lite.*
+            :img-alt:
+
+            Neuro Playground Lite
+
     .. grid-item::
 
         .. card::