unnecessary_dict_kwargs doc - a note on type checking benefits

[Andrej730]

Summary

Recently stumbled upon type checkers typically not being able to verify kwargs when they're unpacked from just constructed dictionary:

Snippet:

def foo(bar: int):
    return bar + 1


print(foo(**{"bar": 2}))
# No typing errors.
print(foo(**{"bar":2, "baz":22}))

pyright-play
mypy-play

And I've found that PIE804 can be helpful to highlight those cases.
Perhaps a note in PIE804 documentation can help advertise this rule as the one also enchancing type safety.

[github-actions]

ruff-ecosystem results

Linter (stable)

✅ ecosystem check detected no linter changes.

Linter (preview)

✅ ecosystem check detected no linter changes.