Build out citations filter on MUR search

[JonellaCulmer]

What are we after:

Add citations filter for statutes and regulations on MUR search using AO search design pattern

Completion criteria:

• Add citations filter for statutes and regulations

Resources:
Designs: fecgov/fec-epics#220
MUR citations PR: fecgov/openFEC#5165

[patphongs]

@JonellaCulmer I'm going to push this up a few sprints because I'd like to use @rfultz's new autosuggest feature rather than using the typeahead, which will be deprecated in our codebase. AOs uses react for their filters, including citations, and I want to move away from that framework and standardize it using autosuggest like all of our other datatables are using. I have created a proof of concept PR so that we know how to revisit this in the future. Once it's incorporated in the autosuggest, it should be relatively easier to implement.