Handle gcd(0, 0) edge case (#14215)

* Use TypeError for non-string input in count_vowels

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Fix docstring and improve input validation in kth_lexicographic_permutation

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Handle gcd(0, 0) edge case

* Update kth_lexicographic_permutation.py

* Update count_vowels.py

* Update greatest_common_divisor.py

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Maxim Smolskiy <[email protected]>