Add new logoImages model

[carl-zzz]

The new logoImages model contains 6 different images to replace the current largeLogo:

• smallLightOnDark
• smallDarkOnLight
• mediumLightOnDark
• mediumDarkOnLight
• largeLightOnDark
• largeDarkOnLight
  However, I think we should standardize the 'logo' (maybe with constant length and width) as well as other sizes of logoImages @jlhughes @kgrgreer
  And I keep largeLogo and largeLogoEnabled for now, and will be removed later, and I also keep the 'logo' because sometime companies/we only need the logo without the slogan or brand word

Related Nanopay changes: https://github.com/nanoPayinc/NANOPAY/pull/11175

[jlhughes]

re: logo - with and without slogan, branding. This is the intent of small, medium, large. Small presumably without slogan, branding unless they provided something that works in a small space.
Perhaps we should also add the favicon here as well.
If we go the route of 'logo', then rather than small, ,,, light/dark, it's

• banner
• login
• ...
• email
  ...