Add typing.TypeForm overloads to tyro.cli() signature

[brentyi]

PEP 747 was finally accepted this past February, will be included in Python 3.15, and has been backported via typing_extensions.

This PR includes TypeForm in overloads for tyro.cli(). This fixes issues like #460.

For more context, see this comment (from 2022!):

tyro/tyro/_typing.py

Lines 1 to 14 in 5f1b975

	# tyro's API relies heavily on parsing type annotations, which may be both "regular"
	# types like `int`, `str`, and classes, or more general forms like `int | str` or
	# `Annotated[str, ...]`.
	#
	# To correctly annotate variables that can take these more general type forms, we need
	# to wait for a typing.TypeForm PEP:
	# https://github.com/python/mypy/issues/9773
	#
	# This doesn't yet exist, so in the meantime we use Type[T] everywhere we would
	# otherwise have TypeForm[T]. This mostly works, and fortunately is supported by pyright
	# and pylance (relevant: https://github.com/microsoft/pyright/issues/4298), but should
	# be switched for the correct typing.TypeForm annotation once it's available.
	from typing import Type as TypeForm

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.64%. Comparing base (2cb43d7) to head (e9b8c1b).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #461      +/-   ##
==========================================
- Coverage   99.64%   99.64%   -0.01%     
==========================================
  Files          52       51       -1     
  Lines        3984     3974      -10     
==========================================
- Hits         3970     3960      -10     
  Misses         14       14              

Flag	Coverage Δ
unittests	99.64% <100.00%> (-0.01%)	⬇️

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