Add: #600 NGルール (#602)

* Wip

* Wip

* Wip: History

* Wip: テストコード作成

* Fix test

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* Fix test

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* なんとか完成、これから動作確認

* spell miss

* Change ng rule timings

* Fix test

* Wip

* Fix test

* Wip

* Fix form

* 表示まわりの改善

app/models/status.rb

@@ -504,6 +504,10 @@ class Status < ApplicationRecord
       %w(unset) + selectable_visibilities
     end
 
+    def all_visibilities
+      visibilities.keys
+    end
+
     def selectable_searchabilities
       ss = searchabilities.keys - %w(unsupported)
       ss -= %w(public_unlisted) unless Setting.enable_public_unlisted_visibility
@@ -514,6 +518,10 @@ class Status < ApplicationRecord
       searchabilities.keys - %w(public_unlisted unsupported)
     end
 
+    def all_searchabilities
+      searchabilities.keys - %w(unlisted login unsupported)
+    end
+
     def favourites_map(status_ids, account_id)
       Favourite.select('status_id').where(status_id: status_ids).where(account_id: account_id).each_with_object({}) { |f, h| h[f.status_id] = true }
     end