Dui3 177 receive levels in Revit

[connorivy]

Description & motivation

Changes:

RevitRootToHostConverter

• A mirror of the RevitRootToSpeckleConverter which not only checks for registered conversions of a specific type, but also moves up the inheritance tree when it doesn't find a converter for the specified type

LevelToHostTopLevelConverter

• Moved over the levelToNative method

LevelConversionToSpeckle

• This was previously just a 'typedConverter', but I changed this to be a top level converter because not only do we want to converter levels as part of other converters, but we want to send them on their own as well

To-do before merge:

Screenshots:

Validation of changes:

can send and receive levels in Revit

Checklist:

• My pull request follows the guidelines in the Contributing guide?
• My pull request does not duplicate any other open Pull Requests for the same update/change?
• My commits are related to the pull request and do not amend unrelated code or documentation.
• My code follows a similar style to existing code.
• I have added appropriate tests.
• I have updated or added relevant documentation.

References