Create a TCK

[ptitFicus]

A Technology Compatibilty Kit would be helpfull to ensure every implementations of scribre-core are corrects.

This would be a great help to #3.

[ptitFicus]

Some work is done on #33 , but some works remains:

• [x] Setup with TestNg (Junit is not an option here since we need to inherit tests, which is not possible in Junit5)
• [x] Command submission should generate & write event
• [x] Invalid command submission should not write anything
• [x] Event should be published in Kafka, even if it's down at first
• [x] Aggregation should rebuild state correctly
• [x] Command submission should be rejected if database is down
• [ ] In transaction projections should be updated
• [ ] Eventually consistent projections should be updated event if Kafka is down at first
• [ ] Consumer should receive published event, even if Kafka is down at first

Implementation are done for both in memory and non-reactive jooq implementation, therefore we need to

• [ ] Implement the above tasks for jooq reactive client