[Docs] Move legacy resource documentation into a legacy dir

docs/SUMMARY.md

@@ -18,27 +18,26 @@
 ## Resource
 
 * [Resource Bundle documentation](resource/index.md)
-  * [Configuration](resource/configuration.md)
-  * [Configure your operations](resource/configure_your_operations.md)
-  * [Configure your resource](resource/configure_your_resource.md)
   * [Create new resource](resource/create_new_resource.md)
-  * [Create resource](resource/create_resource.md)
-  * [Delete resource](resource/delete_resource.md)
-  * [Forms](resource/forms.md)
-  * [Index resources](resource/index_resources.md)
-  * [Installation](resource/installation.md)
-  * [Processors](resource/processors.md)
-  * [Providers](resource/providers.md)
+  * [Configure your resource](resource/configure_your_resource.md)
+  * [Configure your operations](resource/configure_your_operations.md)
+  * [Validation](resource/validation.md)
   * [Redirect](resource/redirect.md)
-  * [Reference](resource/reference.md)
   * [Resource factories](resource/resource_factories.md)
+  * [Providers](resource/providers.md)
+  * [Processors](resource/processors.md)
   * [Responders](resource/responders.md)
-  * [Routing](resource/routing.md)
-  * [Services](resource/services.md)
-  * [Show resource](resource/show_resource.md)
-  * [State machine](resource/state_machine.md)
-  * [Update resource](resource/update_resource.md)
-  * [Validation](resource/validation.md)
+  * [Legacy Resource Documentation](resource/legacy/index.md) 
+    * [Configuration](resource/legacy/configuration.md)
+    * [Services](resource/legacy/services.md)
+    * [Routing](resource/legacy/routing.md)
+    * [Forms](resource/legacy/forms.md)
+    * [Getting a Collection of Resources](resource/legacy/index_resources.md)
+    * [Creating Resources](resource/legacy/create_resource.md)
+    * [Updating Resources](resource/legacy/update_resource.md)
+    * [Deleting Resources](resource/legacy/delete_resource.md)
+    * [Configuring a state machine](resource/legacy/state_machine.md)
+    * [Configuration Reference](resource/legacy/reference.md)
 
 ## Grid
 

docs/resource/index.md

@@ -30,18 +30,8 @@ So far we support:
 * [Responders](responders.md)
 
 # Deprecated documentation
-* [Configuring Your Resources](configuration.md)
-* [Services](services.md)
-* [Routing](routing.md)
-* [Forms](forms.md)
-* [Getting a Single Resource](show_resource.md)
-* [Getting a Collection of Resources](index_resources.md)
-* [Creating Resources](create_resource.md)
-* [Updating Resources](update_resource.md)
-* [Deleting Resources](delete_resource.md)
-* [Configuring a state machine](state_machine.md)
-* [Configuration Reference](reference.md)
+* [Legacy Resource Documentation](legacy/index.md)
 
 ## Learn more
 
-* [Resource Layer in the Sylius platform](https://docs.sylius.com/en/latest/book/architecture/resource_layer.html) - concept documentation
+* [Resource Layer in the Sylius platform](https://docs.sylius.com/the-book/architecture/resource-layer) - concept documentation

docs/resource/legacy/index.md

@@ -0,0 +1,13 @@
+Legacy Resource Documentation
+
+* [Configuring Your Resources](configuration.md)
+* [Services](services.md)
+* [Routing](routing.md)
+* [Forms](forms.md)
+* [Getting a Single Resource](show_resource.md)
+* [Getting a Collection of Resources](index_resources.md)
+* [Creating Resources](create_resource.md)
+* [Updating Resources](update_resource.md)
+* [Deleting Resources](delete_resource.md)
+* [Configuring a state machine](state_machine.md)
+* [Configuration Reference](reference.md)