Add fmi tool Siemens NX MCD

[yfuqiang]

• Update tools.json

Update tools.json to add a new fmi tool, named Siemens NX MCD.

Please help review it. Thank you.

[chrbertsch]

Thanks for adding your tool!
It would be great if you could provide provide compatibility information (see https://github.com/modelica/fmi-standard.org/blob/main/CONTRIBUTING.md#compatibility-information), i.e. how you tested your FMI implementation? (Could also be in a separate Pull Request.) Benefit: your tool will get the "yellow star" and be listed on the top.

[yfuqiang]

Thanks for adding your tool! It would be great if you could provide provide compatibility information (see https://github.com/modelica/fmi-standard.org/blob/main/CONTRIBUTING.md#compatibility-information), i.e. how you tested your FMI implementation? (Could also be in a separate Pull Request.) Benefit: your tool will get the "yellow star" and be listed on the top.

Thank you for your advice. We could provide compatibility information later and create another pull request. Thanks.