Feat: Add 1D Wave convergence example (Matlab & C++) ref Mathews & Fi…#270

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tin7 wants to merge 5 commits intocsrc-sdsu:mainfrom

tin7:feature/second-order-convergence

Commits on Jan 22, 2026

Feat: Add 1D Wave convergence example (Matlab & C++) ref Mathews & Fink Ex 10.1
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Commits on Jan 23, 2026

Fix: Address review (Fixed dt, correct FD grid, rm local ops/imgs)
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Commits on Feb 25, 2026

Commits on Feb 26, 2026

Improve wave1D convergence examples and align MATLAB/C++ naming
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