Establish preliminary structure for documentation

docs/en/development/plugins/create.md

@@ -0,0 +1,27 @@
+---
+title: Create a plugin
+subtitle: Create a plugin from Maven Archetype
+displayToc: true
+---
+
+# Requirements
+
+Be sure you have installed the following software:
+
+* [Java 8](https://java.com/de/download/)
+* [Apache Maven](http://maven.apache.org/)
+
+# Create the plugin structure
+
+Use the scm-manager plugin [archetype](https://maven.apache.org/guides/introduction/introduction-to-archetypes.html)
+to create the plugin structure.
+
+```bash
+mvn archetype:...
+```
+
+Answer the questions of the archetype.
+
+# Implement your plugin
+
+... draw the rest of the owl