Replacing run-unittest.sh by run-unittest.d. Inception

[drug007]

Currently the test suit does not run on Windows because the test suit actively uses posix shell scripts. A solution can be converting shell scripts to d scripts. This is an initial .d version of run-unittest.sh.

run-unittest.sh performs the following tasks:

1. running all scripts in test directory (except it self and common.sh)
2. building, running and testing all D packages in test directory (if it is not disabled for a package)

This PR moves task N1 from run-unittest.sh to run-unittest.d

[dlang-bot]

Thanks for your pull request and interest in making D better, @drug007! We are looking forward to reviewing it, and you should be hearing from a maintainer soon.
Please verify that your PR follows this checklist:

• My PR is fully covered with tests (you can see the coverage diff by visiting the details link of the codecov check)
• My PR is as minimal as possible (smaller, focused PRs are easier to review than big ones)
• I have provided a detailed rationale explaining my changes
• New or modified functions have Ddoc comments (with Params: and Returns:)

Please see CONTRIBUTING.md for more information.

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[veelo]

I like your initiative here. There are a lot of shell scripts to convert, though :-)

[drug007]

Thank you for your review! Yes, there is much work here but it can be done step-by-step.
P.S. what is funny that I use Linux most of all)

[drug007]

@veelo I guess I shouldn't do forced push to keep the review?

[veelo]

@veelo I guess I shouldn't do forced push to keep the review?

I think forced push is fine. I can still click "Show resolved" to see the review and your replies. It keeps the history short when merging without having to squash commits, which is nice.

[drug007]

Ok, thanks for info.

[maxhaton]

@drug007 is this finished?

[drug007]

Yes, I'm eagerly waiting for merging it to continue. I prefer several small PRs to the single big one.

[Geod24]

Thanks for the work, much appreciated.