standalone activity public preview

Signed-off-by: Phil Prasek <prasek@gmail.com>

Author: prasek

standalone-activity/helloworld/README.md

@@ -11,7 +11,7 @@ If you used the above instructions to start the server, you should see a line ab
 
 ```bash
 > temporal server start-dev
-CLI 1.5.1 (Server 1.29.1, UI 2.42.1)
+Temporal CLI 1.7.0 (Server 1.31.0, UI 2.49.1)
 
 Server:  localhost:7233
 UI:      http://localhost:8233