Add Indirect team members

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Is your feature request related to a problem? Please describe.
I am working on making a team based view for Nextcloud (teamhub app in the app store). The mission is to have a starting point for all things related to a team by building upon NC teams. In our current setup we use teams as our basis, have a few things of our own and integrate apps that contribute to teambased work in these team views.
Deck is one of them.

Adding teams or groups to the NC teams is a big pro as this reduces management by alot. This works for all our integrated apps except for Deck.

Deck doesn't allow Group/team X that has been assigned to a team to see the Deck board shared with the team.

Describe the solution you'd like
Deck allows indirect members of a team to see and use the deck board according to the permissions set for the team.

Describe alternatives you've considered
Adding groups/teams that are members of a team directly to boards shared with that team, but that will create manageability and security problems especially for larger deployments.

No files, tests, or entry points are named. Start by tracing how Deck resolves team membership and board permissions, then verify the behavior for groups or teams that are indirect members; done means those members can use a shared board according to the team's permissions without manually sharing each nested group or team.