t-string support (#4805)

* [WIP] t-string support

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

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



* fix failing test case on 3.14

* oh yeah we do string normalization now

* Add changelog entry

* fix mypy

* use py314 branch of pytokens in pre-commit

* Add more test cases

* use published pytokens

* Add `T_STRINGS` feature

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