ENH: Generalize handling of contractions like "'d", "'s" or "'th"

[jcfr]

Systematically strip the contraction from the error word before performing additional checks.

This pull request has the following purposes:

• update the naming from possessive to the more general terminology called contraction
• add support for additional contractions
• systematically strip the known contraction before doing any error checking and accept the updated word if associated spell check succeeds after removing the contraction.

[jcfr]

Thanks for the review 🙏