Add Ferrari-Cardano algorithm and general Quartic Solver test suite#2010

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osanstrong wants to merge 73 commits intoceleritas-project:developfrom

osanstrong:ferrari

Commits on Aug 21, 2025

started adding tests using harness
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Commits on Aug 22, 2025

Added test cases for quartic solver and dominant cubic solver
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Commits on Sep 23, 2025

Added Ferrari Solver
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Added ferrari test file to celeritas test lists
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Started fixing bugs in ferrari solver
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Added missing semicolon, comma
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fixed syntax issues, added temporary debugging statements
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fixed two flipped signs on test polynomials, and one which worked but required higher precision than tolerance allowed
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Added separate quadratic solver to also provide negative real roots, fixed backwards iterator, fixed a couple of arithmetic bugs
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Removed hacky print statements for debugging
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Commits on Oct 6, 2025

Commits on Oct 8, 2025

Removed accidentally created/misnamed bcmake config file
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Commits on Oct 20, 2025

Switched special case equality/zero checks to use SoftZero instead of absolute comparisons
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Commits on Oct 21, 2025

Commits on Oct 22, 2025

Commits on Nov 29, 2025

Commits on Dec 1, 2025

Commits on Dec 3, 2025

Commits on Dec 5, 2025