Sorry for the late reply, I needed some vacation from RobotCode ;-)
But, your PR looks really good!!! I need a little more time to take a closer look at it though.
What I do notice is that I would like to be able to execute individual test cases, not just one, and not just complete robot files. This already works, but it is not yet possible to select the test cases in the RunConfig. Maybe you can find a solution?

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@d-biehl multiple testcases would already be available with comma seperation in includedTestItems field. However maybe it's a problem of UX, therefore I have changed the field to a CheckBoxList from Jetbrains library for a modern look:

However I ask for your opinion about the test suite field. Would you like to keep it or remove it and leave all decision to the Test Items checkbox list ?
Currently both fields remains this means:
if you select a test suite path. We'll only run the tests from this file. However it makes the usage of Test Items list a bit obsolete because if the path is selected, all tests in the given suite path is appended to the selection no matter if they were selected or not.

Hi @d-biehl,
Are you open to merging these changes?

I really appreciate your work on this project and wanted to contribute because I noticed that PyCharm support is progressing a bit slower compared to VSCode, and there are still several TODOs open. Of course, as the project owner, you have every right to reject contributions if they don’t align with your goals.

That said, I'd like to avoid investing further effort into keeping the PR aligned with upstream changes unless there’s interest in moving it forward. I’d be grateful for your feedback—whether it's a review, suggestions for changes, or a decision either way.

Thanks!