Review Bonsai.ONIX naming conventions

[glopesdev]

It would be useful for us and users if we could align naming conventions of Bonsai.ONIX to match general C# and Bonsai package standards. Some ideas below:

• Discuss whether Bonsai is the best namespace for the package
• Review casing conventions for classes and enums

The above points can be split off into separate discussions later and new ones added after further review.

[jonnew]

I have no opinion on Casing conventions other than maintainability and fitting with default linter options. So I guess I do have an opinion.