Add trasformers like `reverse` `to_lower_case`

[skyf0l]

Sometimes, cipher is reversed or maybe something else, not just encoded with bases. It can be a good idea to brute-force them too.

But a problem will arise, it can also generate a lot of false positives... It will have to be tested

Tranformers can be:

• reverse
• to lower/upper/title case
• rotate right/left