Move libraries to organization

[marein]

Libraries should be moved to the organization. They should be registered and loaded within this composer repository. This enables us to use them in other services and break the domains out of this project.

• Application (should be deleted)
  315e3b9
• Bus (rename the library to something more meaningful, e.g. application handler)
• Clock (should be replaced, there's no need for a global static clock anymore, maybe wait for PSR-20)
  Replace static clock #163
• DoctrineHeartbeatMiddleware -> this can be moved to the marein account.
• Domain
• EventStore
• ForkPool -> this can be moved to the marein account.
• IdempotentStorage
• MessageBroker
• ObjectMapper (should be deleted and replaced with something that exists already)
  Replace ObjectMapper #67
• StandardHeadersCsrfBundle
  Move StandardHeadersCsrfBundle #56
• Scheduler (also find a better name, Scheduler is pretty generic, maybe KernelScheduler, AlarmClock or AlarmScheduler) -> this can be moved to the marein account.
• Sharding