Merge pull request 'std.Io.Threaded: rework cancellation' (#30033) from cancellation into master

Reviewed-on: https://codeberg.org/ziglang/zig/pulls/30033
52ad126bb4Andrew Kelley committed on 12/2/2025, 4:58:29 PMparents95f93a0bb3f56d
7 files changedLine totals unavailable