Tweak stubs for better VS Code import (#1234)

* Tweak stubs for better VS Code import

* Modernize the rest of the stubs

* Fix dataclass_transform import

* Changelog

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Update changelog.d/1234.change.md

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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Hynek Schlawack <[email protected]>

Author: 3 people

changelog.d/1234.change.md

@@ -0,0 +1 @@
+Our type stubs now use modern type notation and are organized such that VS Code's quick-fix prefers the `attrs` namespace.