Move rtctools package to src subfolder
This is common practice to avoid e.g. accidentally running tests against the source directory instead of the installed directory. See e.g. https://hynek.me/articles/testing-packaging/ for more explanation.
This is common practice to avoid e.g. accidentally running tests against the source directory instead of the installed directory. See e.g. https://hynek.me/articles/testing-packaging/ for more explanation.