Feature request: Add "split line at fixed position"

First - thanks for the great tool - I :heart: it :smiley:

I'd like to request the following recipe:
split all lines at position x using either CR xor CR/LF xor LF

Example: if you base64-encode something, it may be necessary to split this string at a fixed position because e.g. the SMTP dialogue doesn't like very long lines. My workaround is to copy / base the encode string into a text editor and then use its internal functionality or a macro. It works, but it takes time and - more important - is error-prone.

Thanks!