feat:506 show all module settings

[flavoromission]

Problem: Missing fields are omitted.

Solution: This fix sets the flag always_print_fields_with_no_presence in the invocation of the protobuff method MessageToJson will display the missing fields.

see: MessageToJson https://github.com/protocolbuffers/protobuf/blob/6b36eb633ccc9c585ed1ead117fca91702814027/python/google/protobuf/json_format.py#L82 see: issue #506 https://github.com/meshtastic/python/issues/506

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[ianmcorvidae]

This looks pretty reasonable to me, but we can't merge it without a signed CLA. If you can do that, I think I'd be happy to get this in.

[flavoromission]

The PR should be all set @ianmcorvidae

[ianmcorvidae]

Excellent, thanks for signing that. I'll get this merged in, and thanks for the PR!