* Add Gaussian Mixture Model (GMM) algorithm
* [pre-commit.ci] auto fixes from pre-commit.com hooks
for more information, see https://pre-commit.ci
* Add trailing newline and finalize Gaussian Mixture Model implementation
* Fix Mypy type alias issue for FloatArray
* Use modern 'type' syntax for FloatArray to satisfy Ruff UP040
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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
