Staff > Adopters: Paginate and Add a filter to enable staff to search for a given user by name or email

[kasugaijin]

Log in as staff and go to /staff/adopters. We should add a filter on this page (see most other pages with filters for an example). The staff should be able to filter on name, or email (see Fosterer filter for name example). You will need to add email as a ransackable attribute on User. The rest should be pretty similar to other implementations in the app.

I think it's worth adding controller tests to ensure the filter works on the collection as expected.

[caitlynl22]

I'll take this on!

[jmilljr24]

@caitlynl22 Thanks!