Reorganized structure into multiple modules

[ianfd]

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[Copilot]

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

Comments suppressed due to low confidence (2)

src/laczos/mod.rs:1150

• The new indexing logic replaces a decrementing index pattern; please verify that calculating 'idx' as 'k * js + i' preserves the intended ordering and semantics of the original algorithm.

let idx = k * js + i;

src/lib.rs:176

• The test 'test_random_svd_computation' now uses 7 power iterations, while another test uses 2; please confirm that the discrepancy in power iteration parameters is intentional and well-documented.

let result = randomized::randomized_svd(