lv_assemble should build a valid resource file

[marcpage]

Is your feature request related to a problem? Please describe.
You can disassemble a LabVIEW resource file but you cannot reassemble it.

Describe the solution you'd like
Update pylavi.file to be able to save. It does not have to be an exact replica, but should contain all resources with names and id's. All resources should be exact replicas. The resource should be usable by LabVIEW.

Describe alternatives you've considered
Store all the ordering and padding so if minimal changes are made the exact file can be rebuilt.

Additional context
None.