docs: add requirements

Author: ldez

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

@@ -9,6 +9,10 @@ title: Module Plugin System
 - define the plugin inside the  `linters-settings.custom` section with the type `module`.
 - run your custom version of golangci-lint
 
+Requirements:
+- Go
+- git
+
 ### Configuration Example
 
 ```yaml title=.mygcl.yml