feat: Ability to customise the email sender name [CW-1629] (#7345)

db/migrate/20230525085402_add_custom_sender_name_toggle.rb

@@ -0,0 +1,5 @@
+class AddCustomSenderNameToggle < ActiveRecord::Migration[7.0]
+  def change
+    add_column :inboxes, :sender_name_type, :integer, default: 0, null: false
+  end
+end

db/migrate/20230614044633_add_sender_name_to_in.rb

@@ -0,0 +1,5 @@
+class AddSenderNameToIn < ActiveRecord::Migration[7.0]
+  def change
+    add_column :inboxes, :business_name, :string, null: true
+  end
+end