Discoverability of the RobotModelObject

[gidodielemans]

What type of change is this?

Extension of the init statements for ghpython, seemed missing backwards-compatible hasn't been tested

Checklist

• [ ] I added a line to the CHANGELOG.md file in the Unreleased section under the most fitting heading (e.g. Added, Changed, Removed).
• [ ] I ran all tests on my computer and it's all green (i.e. invoke test).
• [x] I ran lint on my computer and there are no errors (i.e. invoke lint).
• [ ] I have added tests that prove my fix is effective or that my feature works.
• [ ] I have added necessary documentation (if appropriate)

[Licini]

Seems good to me but @tomvanmele You are more familiar with stuff related to Rhino 8