Fix minor typing errors in maths/ (#8959)

* updating DIRECTORY.md

* types(maths): Fix pylance issues in maths

* reset(vsc): Reset settings changes

* Update maths/jaccard_similarity.py

Co-authored-by: Tianyi Zheng <[email protected]>

* revert(erosion_operation): Revert erosion_operation

* test(jaccard_similarity): Add doctest to test alternative_union

* types(newton_raphson): Add typehints to func bodies

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Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>
Co-authored-by: Tianyi Zheng <[email protected]>