This commit switches `model::Type::ID` from being a GUID to be a
progressive number, in order to make things easier for humans.
On top of this, this commit introduces the following changes:
* TypeCopier: import all the necessary PrimitiveTypes and improve
handling of CustomName.
* Move Kind as the last field of the key of each TupleTree type used in
an `UpcastablePointer`.
* Update the ground truth of tests to ignore the `CustomName` in favor
of focusing on `OriginalName`.
* Increase adoption of `model::Binary::makeType`, equivalent to
`Binary.recordNewType(makeType<model::*Type>())`.
Add a specialized list class to be used in the model. This will do
runtime instance checking to make sure that list-like fields in the
model only contain object of the correct type.
Implement a constructor override for model classes that checks that the
constructor does not have positional arguments passed to it. This can
be dropped post-3.10 since it is implemented natively by kw_only.
Alessandro Di Federico