Support Unpack aka PEP 692 annotations

[multimeric]

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Example Code

from typing import Unpack, TypedDict
import typer

class Args(TypedDict):
    a: int
    b: str

def main(**kwargs: Unpack[Args]):
    pass

typer.run(main)

Traceback (most recent call last):

  File "/private/var/folders/q5/fvpyppm924525yl9m3xpgjm400031g/T/tmp.dvMKlgyv/test.py", line 11, in <module>
    typer.run(main)

RuntimeError: Type not yet supported: *<class '__main__.Args'>

Description

Above is a fairly simple example of how Unpack might be used with typer. There are many reasons why a user might want to do this, as outlined in the PEP. My immediate use case for this is to re-use an argument definition I use elsewhere, so I don't have to duplicate the function's type signature and risk the duplicated copies getting out of sync.

Typer would be able to support this by introspecting the TypedDict using __optional_keys__ etc.

Operating System

Linux, macOS

Operating System Details

Monterey (12.6)

Typer Version

0.9.0

Python Version

3.11.5

Additional Context

No response