In this PR, we modify the following:

• fuzz token set ratio from fuzzywuzzy with the much faster rapidfuzz version. we also make this more flexible with an option to measure other kinds of fuzz metrics, namely: ratio, partial ratio, token_sort_ratio, token_sort_partial_ratio, and token_set_partial_ratio.
• we replace some plain metrics from textdistance with the rapidfuzz version (this is faster as documented in the issue). the metrics we replace are lccseq, hamming, jarowinkler, levenshtein. We retain textdistance variants for cosine and jaccard given rapidfuzz doesn't have a version.
• Added rouge scores as plain string metrics
• Renaming variables for clarity, e.g., doc1 to str1 and value1 to str1 given all inputs are supposed to be strings and these were not consistent.
• Adding types for arguments and return.
• Editing documentation to reflect the changes
• Added tests