Add an eval_int command to the remote API and Python interface

[chameco]

Partially addresses #1642. I'm marking this as a draft because I intend to add equivalents for other types (or maybe one eval command that works on everything) before merging.

[chameco]

For now, eval_int and eval_bool are implemented. eval_size seems trickier, and maybe not even useful in the Python setting right now, because as far as I know there is no way to define a Cryptol type value through the API (something like SAWScript's {| ... |}).

eval_list returns a list of Terms, which doesn't map nicely to the API as designed currently - functions that would take a Term in SAWScript instead typically take a Cryptol expression. I'm not sure if eval_list is even useful in Python, necessarily - in my experience it is mostly used in SAWScript to get around a lack of list manipulation primitives.

[RyanGlScott]

Thanks, @chameco! I've left some minor suggestions inline, but otherwise this LGTM.

eval_size seems trickier, and maybe not even useful in the Python setting right now, because as far as I know there is no way to define a Cryptol type value through the API (something like SAWScript's {| ... |}).

Ah, good point. I do think we'll want to have a Python counterpart to {| ... |} at some point, so it would be worth opening an issue about that. I agree that we don't need to solve that problem in this PR, however.

[RyanGlScott]

Suggested change

	def eval_bool(expr: cryptoltypes.CryptolJSON) -> int:
	def eval_bool(expr: cryptoltypes.CryptolJSON) -> bool:

[chameco]

It's curious that the Mypy run in CI didn't catch this. Testing locally: if I remove the isinstance check, I get the expected type error ("returning Any from a function declared to return bool"), but I don't get any error if the isinstance check mismatches the declared return type.

[WeeknightMVP]

A bool is an int:

>>> isinstance(False, int)
True
>>> isinstance(True, int)
True
>>> issubclass(bool, int)
True

[chameco]

Ah, that would explain it. TIL. Thanks!

[RyanGlScott]

Also, can you update the changelogs for saw-remote-api and the SAW Python client to mention these changes? Thanks!