docs: add command for building examples

Author: Qix-

README.md

@@ -43,6 +43,12 @@ cargo limine-x86_64
 cargo limine-aarch64
 ```
 
+To build the example modules:
+
+```shell
+cargo oro-examples
+```
+
 ## Documentation
 The Oro kernel is thoroughly documented. You may generate a local copy of
 the documentation with: