feat(citations): use eyecite.find.find_reference_citations_from_markup

[grossir]

Adds logic to use freelawproject/eyecite#203

[sentry-io]

🔍 Existing Issues For Review

Your pull request is modifying functions with the following pre-existing issues:

📄 File: cl/citations/tasks.py

Function	Unhandled Issue
store_opinion_citations_and_update_parentheticals	NameError: name 'logger' is not defined cl.citati... Event Count: 3
store_opinion_citations_and_update_parentheticals	TypeError: object of type 'Opinion' has no len() ... Event Count: 2

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