Editors can now skip copyeditor acknowledgement emails

[ajrbyers]

Closes #1027

• Editors can now skip sending this message
• It also now uses the email data class and has its own view/template to be consistent with others
• Added some tests to ensure skipping skips 😄

[joemull]

Looks pretty good. I just noticed a couple things:

• The HTML heading structure you use here is not accessible, but I assume you knew this and were copy-pasting a different existing template, with a plan to change all these later?
• I tested it out and noticed that the view for re-opening the copyedit still uses the modal. In scope or out of scope?
  
• Needs ruff formatting to pass CI