Adding a mermaid diagram of the wizard flow (#1809)

Shows the different controllers and how they connect together

Co-authored-by: Hector Correa <[email protected]>

docs/wizard_flow.md

@@ -0,0 +1,45 @@
+```mermaid
+ flowchart TD
+    subgraph UsersController
+      user_show[show]
+    end
+    subgraph WizardPolicyController
+      show -- user accepts policy --> update
+      show -- User cancels --> user_show
+    end
+    update --> new_submission
+    subgraph WizardNewSubmissionController
+        new_submission -- user submits form --> new_submission_save
+        new_submission -- User cancels --> user_show
+    end
+    new_submission --> edit_wizard
+    subgraph WorksWizardController
+        edit_wizard -- user submits metadata --> update_wizard
+        edit_wizard -- User cancels --> user_show
+        edit_wizard -- User saves --> edit_wizard
+        update_wizard --> update_additional
+        readme_select -- User uploads Readme --> readme_uploaded
+        readme_select -- User cancels --> user_show
+        readme_select -- User saves --> readme_select
+        readme_uploaded --> attachment_select
+        attachment_select --> attachment_selected{Large Files?}
+        attachment_selected -->|Yes| file_other
+        attachment_selected -->|No| file_upload
+        file_other -- User notes file location --> review
+        file_other -- User cancels --> user_show
+        file_other -- User saves --> file_other
+        file_upload -- User uploads Attachments --> review
+        file_upload -- User cancels --> user_show
+        file_upload -- User saves --> file_upload
+        review -- User Submits work as complete --> validate
+        review -- User cancels --> user_show
+        review -- User saves --> review
+    end
+
+    subgraph WorksUpdateAdditionalController
+      update_additional-- user submits form --> update_additional_save
+      update_additional_save -- User cancels --> user_show
+      update_additional_save -- User saves --> update_additional_save
+      update_additional_save --> readme_select
+    end
+```