feat(developer): compiler should check BCP47 part of model name

### Is your feature request related to a problem? Please describe.

The compiler should make additional checks on the name of a lexical model.

Developer should check the name of a new lexical model project.

### Describe the solution you'd like

When checking the name of a lexical model, the first and third parts should use underscores and not allow hyphens. The middle part of the name is a BCP 47 code and should use hyphens rather than underscores.

Two models that are in the repository with underscore in the BCP 47 code are:
gff/gff.ti_er.gff_tigrinya_eritrea
gff/gff.ti_et.gff_tigrinya_ethiopia
and this could have been caught and flagged by the compiler.

### Describe alternatives you've considered

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### Keyman version

16

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