Add demo gifs

Author: timgent

README.md

@@ -43,6 +43,8 @@ This command will:
 4. Create a configuration file (.cari.yaml) in your project
 5. Copy the selected rule files to your project
 
+![Init Demo](assets/init.gif)
+
 ### Update AI Rules
 
 Update the AI rules in your project:
@@ -60,6 +62,8 @@ This command will:
 3. Copy the latest version of those rules to your project
 4. Ask if you want to include any new central rules it finds
 
+![Update Demo](assets/update.gif)
+
 ## For Contributors
 
 ### Requirements