Refactor the forking process and add new images

[ci skip]

doc/workflow/forking_workflow.md

@@ -8,30 +8,45 @@ document more information about using branches to work together.
 
 ## Creating a fork
 
-In order to create a fork of a project, all you need to do is click on
-the fork button located on the top right side of the screen, close to
-the project's URL and right next to the stars button.
+Forking a project is in most cases a two-step process.
 
-![Fork button](forking/fork_button.png)
 
-Once you do that you'll be presented with a screen where you can choose
-the namespace to fork to. Only namespaces (groups and your own
-namespace) where you have write access to, will be shown. Click on the
-namespace to create your fork there.
+1.  Click on the fork button located in the middle of the page or a project's
+    home page right next to the stars button.
 
-![Groups view](forking/groups.png)
+    ![Fork button](img/forking_workflow_fork_button.png)
+
+    ---
+
+1.  Once you do that, you'll be presented with a screen where you can choose
+    the namespace to fork to. Only namespaces (groups and your own
+    namespace) where you have write access to, will be shown. Click on the
+    namespace to create your fork there.
+
+    ![Choose namespace](img/forking_workflow_choose_namespace.png)
+
+    ---
+
+    **Note:**
+    If the namespace you chose to fork the project to has another project with
+    the same path name, you will be presented with a warning that the forking
+    could not be completed. Try to resolve the error and repeat the forking
+    process.
+
+    ![Path taken error](img/forking_workflow_path_taken_error.png)
+
+    ---
 
 After the forking is done, you can start working on the newly created
-repository. There you will have full
-[Owner](../permissions/permissions.md) access, so you can set it up as
-you please.
+repository. There, you will have full [Owner](../permissions/permissions.md)
+access, so you can set it up as you please.
 
 ## Merging upstream
 
 Once you are ready to send your code back to the main project, you need
 to create a merge request. Choose your forked project's main branch as
 the source and the original project's main branch as the destination and
-create the merge request.
+create the [merge request](merge_requests.md).
 
 ![Selecting branches](forking/branch_select.png)