Do not merge - Prototype intellisense by emitting function signatures for all classes

[markpeek]

Based on the auto-gen work and @ITProKyle typing changes, I put together a quick prototype to allow for some intellisense functionality. This is a WIP.

To try out:

- Download the branch
- Install the dev requirements
- make spec
- make regen (note: wafv2 will fail)
- Test with your favorite editor

Issues:

• Template has a circular dependency so tests fail. Does anyone even use that argument?
• wafv2 has a "None" property name that doesn't play well with python. Guess no one is using it anyway.
• Doesn't handle multiple validation types where a Union might be needed.
• Likely more...this was a quick test.

Might be of interest to @JohnPreston @michael-k

[michael-k]

Generates eg.

class Group(AWSObject):
    def __init__(
        self,
        title: Optional[str],
        template: Optional[Template] = None,
        validation: bool = True,
        *,
        GroupName: iam_group_name = None,
        ManagedPolicyArns: "list[str]" = None,
        Path: iam_path = None,
        Policies: "list[Policy]" = None,
    ):
        ...

but iam_group_name and iam_path aren't valid types. It also shouldn't add = None for required properties.

Personally I'd prefer switching to dataclasses or pydantic instead of generating __init__ methods.

[michael-k]

list[…] instead of typing.List[…] is only available in Python 3.9+