Potential code generation changes.

[anschweitzer]

This issue lists changes that might simplify use of code generation. These are open for discussion and/or experimentation.

1. Place all enum code in one file, not in each component/cac (if feasible).
2. Make enums use text in the HardwareLayout. We want to retain the explicitness of a selected an enum text associated with a specific unique identifier. We want to add readability in the hardware layout. Options include:
   1. Use small digital numbers (1, 2 etc...). Experience has shown these are much or easy to recognize and remember than randomly generated hex numbers and if we can assume control of the source of truth, which is probably required anyway, are no less secure than randomly generated numbers.
   2. Use updated version of python that will support bidirectional mapping of text to value by the enum class and allow uniqueness enforcement (in python)
   3. Keep a local mapping in the hardware layout so that within in a context in which the hardware layout is verified the text can be used.
   4. Digitally sign the hardware layout so we know that mapping is reliable within the hardware layout.
3. CACs and Components can be be implicitly decoded, as shown by:
   • load_cacs()
   • default_cac_decoder,
   • CacDecoder
   • PydanticTypeNameDecoder
   • and finally create_discriminator, the existing code which creates a pydantic BaseModel which decodes itself based on TypeName.
4. Remove most _Maker classes in favor of from_data_class() and to_data_class() functions on the relevant class, which should require substantially fewer lines and better locality that the Maker code. We still have the option to use Makers when the simple conversion functions aren't sufficient.
5. Consider moving data_class classes into same module as 'types' class. If this is in fact feasible it would remove mental load of tracking multiple files, better locate the relevant versions of the object and potentially remove issues with cyclic import that require otherwise require additional files to be created.