Added train_fmu_gym to tools.json

[JohannesUl]

No description provided.

[chrbertsch]

Thanks for adding your tool!

For the "examplesURL" you provide "https://codebase.helmholtz.cloud/dlr-vsdc/train_fmu_gym".
However there I do not find information, for which FMUs you have tested your implementatation (e.g. Reference FMUs, Dymola, ....)
Could you add section "Compatbility information" in the README.md?
As you use fmpy, you could also add a statement, that you support import all FMUs that are supported by fmpy.

[JohannesUl]

@chrbertsch: Thanks for the comment. I will add the information in the next public version.

[chrbertsch]

@chrbertsch: Thanks for the comment. I will add the information in the next public version.

Could you not just update the README.md independent from the release?
Or remove the exmplesURL from this PR and add it once you have added the "Compatibility information"?

[JohannesUl]

I updated the README.md with the compatibility information and information about the compatibility tests.