Add character escaping in Gen

[nai888]

Is your feature request related to a problem? Please describe.
There is currently no way to use control characters as characters you want in your results. This should be added via escaping.

Describe the solution you'd like
Add the ability to use " " quotes to escape control characters. For example, the pattern s[tu/ka] would produce stu ska, but the pattern s"[tu/ka]" would produce the output s[tu/ka].

Additional context
You can find the instructions for using this feature within Awkwords in its help file.