Add LDL decomposition#1515

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ajefweiss wants to merge 5 commits intodimforge:mainfrom

ajefweiss:ldldecomp

Commits on May 6, 2025

Commits on May 14, 2025

hermitian ldl, better tests
ajefweiss
committed

Commits on Nov 25, 2025

update docs, renamed cholesky_l to lsqrt and added extra checks
ajefweiss
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Commits on Dec 3, 2025

in place ldl factorization
ajefweiss
committed