Support for assemblies added

[pawelbaran]

Issues addressed by this PR

Closes #1234

Test files

On SharePoint - works with an empty file.

Changelog

• Revit Assembly wrapper object introduced in Revit_oM
• Push adapter action tweaked to support Assembly creation, which requires a few separate transactions
• Relevant converts and other useful methods added

Additional comments

[pawelbaran]

@BHoMBot check core
@BHoMBot check compliance

[bhombot-ci]

@pawelbaran to confirm, the following actions are now queued:

• check core
• check code-compliance
• check documentation-compliance
• check project-compliance
• check branch-compliance
• check dataset-compliance
• check copyright-compliance

[pawelbaran]

@BHoMBot check installer

[bhombot-ci]

@pawelbaran to confirm, the following actions are now queued:

• check installer

There are 8 requests in the queue ahead of you.

[pawelbaran]

@BHoMBot check null-handling
@BHoMBot check serialisation
@BHoMBot check versioning

[bhombot-ci]

@pawelbaran to confirm, the following actions are now queued:

• check null-handling
• check serialisation
• check versioning

[vietle-bh]

Just 2 tiny notes, as the rest is so well executed!

[pawelbaran]

@BHoMBot check ready-to-merge

[bhombot-ci]

@pawelbaran to confirm, the following actions are now queued:

• check ready-to-merge

There are 7 requests in the queue ahead of you.