[Tracking issue] Infrastructure for Stage 2

[aborg-dev]

This is a tracking issue for all infrastructure work for Stage 2.

As our test and benchmarking suite grows, we should invest more time to make it convenient to work with them.
In an ideal world, after every change we would get a clear report of the effects on the performance and correctness of the tests - we could even generate such a report as a part of a PR request (e.g. using a CI bot).
In the same way, we need a fast local tooling that can present such a report.

Tasks

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1. [Tracking issue] Test infrastructure for Stage 2 #172
   2 of 9
   +0
   
2. [Tracking issue] Benchmarking infrastructure for Stage 2 #173
   0 of 4
   +0
   
3. Make convinent developer CLI #116
   enhancement good first issue +2

[aborg-dev]

I'm closing this in favor of more fine-grained tracking issues about testing and benchmarking.