add `std.error_set` helpers (`containsAll`,`Excluding`,`Intersect`) - #19092

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rohlem:PR-std-error_sets

Commits on Jul 29, 2024

add `std.error_set` with set operations

rohlem
authored and
squeek502
committed
1a97b97
add asserting variants to `std.error_set`

rohlem
authored and
squeek502
committed
7e94d94
Use std.error_set to define SelfExePathError
squeek502
committed
e2fc9c1