.NET 10 migration breaking changes

1. PR150 Automapper library (now paid) removed. Please use Obelisk Projections instead for all entity to Dto mappings.
2. PR150 Obsolete Create and Update commands, as well as CreateHandler and Updatehandler removed. Do not use generic Create and Update commands in your code, and if you do, please replace them with non-generic implementations. Note, Obelisk Core does not provide default Create and Update commands out of the box anymore. Those default command handlers used Automapper to map a dto into an entity, skipping all related business logic.
3. PR163 MediatR library (now paid) removed and replaced with our own version of OneBeyond.Studio.Core.Mediator. Please see the PR on how you can replace the mediator in your code if needed.
4. PR155 FluentAssertions library (now paid) removed and replaced with AwesomeAssertions.
5. PR155 Infrastructure based on RabbitMQ support removed.