[Feature]: add combinator to handle text that is prefixed or suffixed

[purpleclay]

Describe your feature

chomp is currently missing combinators that can handle strings that are either prefixed or suffixed:

• Hello,: is prefixed with a ,
• :Hello: is suffixed with a :

These combinators should not return the extracted text with these defined prefix or suffix characters.

Any additional information?

No response

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