Added Mock module

[szabo137]

This moves the test implementation from the test directory to the src and exposes it as a submodule. It can be excesses elegantly:

using QEDbase.Mocks

proc = MockProcess(...)

Furthermore, the notion of Test as prefixes is replaced by Mock to be more explicit with the meaning of the module Mocks.

solves #151

Summary of changes

• moved test implementation to QEDbase.Mocks
• replaced 'test' by 'mock' where appropriate
• adjusted unit tests

[szabo137]

Would be nice, if we could release QEDbase after this is merged to expose QEDbase.Mocks to the other packages of the framework.

[AntonReinhard]

Would be nice, if we could release QEDbase after this is merged to expose QEDbase.Mocks to the other packages of the framework.

Maybe we should do that together with the current PSDEF removal. Otherwise, we'll have two breaking releases right after each other. I don't think a release should be necessary before then because the non-release pipelines all work with the dev versions anyway.