readme: add plugin asciicast from example

Signed-off-by: Christian Stewart <[email protected]>

Author: paralin

README.md

@@ -182,6 +182,8 @@ provides support for the Config type, (see the boilerplate example).
 
 ## Plugins
 
+[![asciicast](https://asciinema.org/a/I4LOCViLwzRlztYc1rytgAxWp.svg)](./example/plugin-demo)
+
 The [plugin](./plugin) system and compiler scans a set of Go packages for
 ControllerBus factories and bundles them together into a hashed Plugin bundle.
 The compiler CLI can watch code files for changes and re-build automatically.

plugin/README.md

@@ -1,5 +1,9 @@
 # Plugins
 
+[![asciicast](https://asciinema.org/a/I4LOCViLwzRlztYc1rytgAxWp.svg)](../example/plugin-demo)
+
+Check out the [plugin demos](../example/plugin-demo).
+
 Analyze Go code to bundle controller factories into Plugin modules.
 
 Features: