WIP: Add support for HyperHessian backend#940

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KristofferC wants to merge 9 commits intoJuliaDiff:mainfrom

KristofferC:kc/hyperhessians

Commits on Apr 23, 2026

WIP: Add support for HyperHessian backend

KristofferC
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only run HyperHessians tests

KristofferC
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less tests

KristofferC
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also have source for HyperHessians

KristofferC
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package is now registerd
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address review comments
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updates
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fixups and use ADTypes HyperHessians
KristofferC
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Commits on Apr 27, 2026

bump compat for ADTypes
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