draft: introduce concepts to pattern/forall.hpp#1990

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johnbowen42 wants to merge 4 commits intofeature/bowen/cpp20from

feature/bowen/cpp-20-concepts

Commits on Feb 17, 2026

Initial concepts implementation
johnbowen42
committed

Commits on Feb 18, 2026

Replace pattern/forall.hpp SFINAE with concepts and requires
johnbowen42
committed

Commits on Feb 19, 2026