Caesar Cipher Salad

A Caesar Cipheris a simple substitution cipher that
replaces each letter in a message with a letter that
is a fixed number of position down the alphabet.

In Haskell, you can implement a Caesar Cipher by converting
the message to a list characters, mapping each characters
to its corresponding encrypted character, and then converting
the encrypted message back to a string.Here's an example of
implementing a Caesar Cipher in Haskell.

Shift a letter by a given number of positions.