[Builtins] Store constants in a `data instance`#4200

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effectfully wants to merge 3 commits intoIntersectMBO:masterfrom effectfully:effectfully/builtins/introduce-HiddenValueOf

+237-108

Commits on Nov 6, 2021

[Builtin] Introduce 'HiddenValueOf'
effectfully
committed

Commits on Nov 7, 2021