Added ciphers/permutation_cipher.py. (#9163)

* Added permutation_cipher.py

* Added type hints for parameters

* Added doctest in functions

* Update ciphers/permutation_cipher.py

Ya i felt the same but held back because there is a implementation of transposition_cipher.py. But that's is different from the one i have implemented here.

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

* Update ciphers/permutation_cipher.py

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

* Update ciphers/permutation_cipher.py

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

* Update ciphers/permutation_cipher.py

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

* Update ciphers/permutation_cipher.py

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

* Update ciphers/permutation_cipher.py

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

* Update ciphers/permutation_cipher.py

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

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* Changes

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