Views: add new create views

[agjohnson]

Implement the views added in the related PR below, replacing list/form combination views

• [x] Translation create
• [x] User maintainer create
• [x] User invitations listing
• [x] User invitations detail
• [x] Email notification create
• [x] #338
• [x] Consolidate patterns for listing view create buttons
• [ ] Organization owner create This view is missing, see https://github.com/readthedocs/readthedocs.org/issues/11295
• [x] Test organization owner/team invites

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• Refs https://github.com/readthedocs/readthedocs.org/pull/11246
• Refs https://github.com/readthedocs/readthedocs.org/issues/10777