Add top level repo README

Author: Koji23

README.md

@@ -1,2 +1,10 @@
 # iam html templates
- HTML templates for in-app messaging 
+ HTML templates for in-app messaging
+
+## In-app Messaging Templates
+* [Leads (SMS + Email)](./sms_email_form/README.md)
+* [Survey (Ranking 1-5)](#/README.md)
+* [Carousel](#/README.md)
+* [Responsive](#/README.md)
+* [Promo Wheel](#/README.md)
+