Clean up, maintenance, and the future of Catalog UI Search

[Lambeaux]

Note: Issue migrated from DDF (codice/ddf#4656)

Description

Provide an issue that can be used to discuss the future of the module, aggregate related issues, maintenance, and work out a vision for the future of UI development and accompanying services.

Expected behavior:

Any effort that helps the UI be less coupled to DDF or provides insight to a stable, versionable API around DDF is welcome. See #4606 for initial ideas.

Alternatives include:

• Extracting just the JavaScript / UI itself to a separate repo, and versioning Intrigue's backend components themselves.