docs: add linter example

Author: ldez

docs/src/docs/plugins/module-plugins.mdx

@@ -2,6 +2,8 @@
 title: Module Plugin System
 ---
 
+An example linter can be found at [here](https://github.com/golangci/example-plugin-module-linter/settings).
+
 ## The Automatic Way
 
 - define your building configuration into `.mygcl.yml`