#1034 Create permissions for debug sections

- Add an individual permission for each debug section (including wildcard perm)
- Create test for DebugCommand
- Refactor tests for the enum permission nodes to use the same abstract class
- Update related project files (plugin.yml, permission docs, command docs)

src/main/java/fr/xephi/authme/permission/PlayerStatePermission.java

@@ -29,12 +29,7 @@ public enum PlayerStatePermission implements PermissionNode {
     /**
      * Permission to bypass the purging process.
      */
-    BYPASS_PURGE("authme.bypasspurge", DefaultPermission.NOT_ALLOWED),
-
-    /**
-     * Permission to use the /authme debug command.
-     */
-    DEBUG_COMMAND("authme.debug", DefaultPermission.OP_ONLY);
+    BYPASS_PURGE("authme.bypasspurge", DefaultPermission.NOT_ALLOWED);
 
     /**
      * The permission node.