Project: add sharing admin view templates

[agjohnson]

Needed:

• [x] Sharing token listing

  • [x] Base listing and delete
  • [x] Decide on listing metadata
  • [x] Show expired state

• [x] Sharing token creation form and likely JS view

• [x] Remove/edit etc views

• [x] Multi select on versions doesn't work

• [x] Tune content for sharing types on the form view

• [x] Add navigation breadcrumbs to form/detail view

• Requires https://github.com/readthedocs/readthedocs-corporate/pull/1695

[agjohnson]

I had to patch commercial code to make the multiple choice field render correctly. The wrong widget is being used from the view. It looks good now though!

[agjohnson]

https://github.com/readthedocs/ext-theme/assets/1140183/1b7477c0-c240-4458-b63c-d549858597b4