expand migration to more apps

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More apps should support migration.

• Tables https://github.com/nextcloud/tables/issues/1424
• Mail https://github.com/nextcloud/mail/issues/12001
• Calendar https://github.com/nextcloud/server/issues/56241
• Contacts https://github.com/nextcloud/server/issues/56242
• Talk https://github.com/nextcloud/spreed/issues/16660
• Teams ? to discuss
• collectives https://github.com/nextcloud/collectives/issues/2185
• Photos (albums and other settings) https://github.com/nextcloud/photos/issues/3361
• Forms
• Deck https://github.com/nextcloud/deck/issues/3828
• Activity https://github.com/nextcloud/activity/issues/2301
• Dashboard settings https://github.com/nextcloud/server/issues/57423
• Personal settings needs a double check if all are included

No source files, tests, or entry points are identified. Start by reviewing the migration app and the linked issues for Mail, Talk, Collectives, Photos, Activity, and Dashboard settings, then define the apps and migration data that are in scope before implementation; done means the agreed apps support migration and their behavior is covered by tests.