Is your feature request related to a problem or issue you encountered? Please describe.
The Cosmos SDK migrated its modules to collections: https://docs.cosmos.network/v0.50/build/packages/collections
A package that makes store accessibility easier thanks to a common API and less boilerplate.

ref: cosmos/cosmos-sdk#14300

Describe the solution you'd like
Scaffolded modules should use collections

Describe alternatives you've considered
Keep the boilerplate, which would not be following the SDK direction.

Include other useful information that helps us understand your request.