Create tagging system (#792)

* Repro

* Fix

* Update signage

* Create tagging system

* Add tags to transaction imports

* Build tagging UI

* Cleanup

* More cleanup

config/locales/views/settings/en.yml

@@ -65,6 +65,7 @@ en:
       rules_label: Rules
       security_label: Security
       self_hosting_label: Self-Hosting
+      tags_label: Tags
       transactions_section_title: Transactions
       whats_new_label: What's New
     nav_link_large:

config/locales/views/tags/en.yml

@@ -0,0 +1,33 @@
+---
+en:
+  tags:
+    create:
+      created: Tag created
+    deletions:
+      create:
+        deleted: Tag deleted
+      new:
+        delete_and_leave_uncategorized: Delete "%{tag_name}"
+        delete_and_recategorize: Delete "%{tag_name}" and assign new tag
+        delete_tag: Delete tag?
+        explanation: "%{tag_name} will be removed from transactions and other taggable
+          entities.  Instead of leaving them untagged, you can also assign a new tag
+          below."
+        replacement_tag_prompt: Select tag
+        tag: Tag
+    edit:
+      edit: Edit tag
+    form:
+      create: Create tag
+      update: Update
+    index:
+      empty: No tags yet
+      new: New tag
+      tags: Tags
+    new:
+      new: New tag
+    tag:
+      delete: Delete
+      edit: Edit
+    update:
+      updated: Tag updated

config/routes.rb

@@ -37,6 +37,10 @@ Rails.application.routes.draw do
     end
   end
 
+  resources :tags, except: %i[ show destroy ] do
+    resources :deletions, only: %i[ new create ], module: :tags
+  end
+
   resources :transactions do
     collection do
       match "search" => "transactions#search", via: %i[ get post ]