parse_answer_with_prefixes

Parses string into key-value pairs, according to patterns supplied in prefixes.

Also strips.

If inputs are:

completion = "
o: sam
bye then: paul.",
prefixes = {"greeting": "hello:", "farewell": "goodbye then:"}

... the expected returned result is:

`{"greeting": "sam", "farewell": "paul."}`

Args:
    completion: Text to split
    prefixes: A key-value dict of keys and patterns.

        See example above

Returns:
    Parsed result