Allow Filtering By Multiple Taxonomy Groups

[letioneill]

We would like the DReact Search Filter to allow filtering by multiple taxonomy groups. Below are two real-world use cases:

Policy Website

Two taxonomy groups: one is nested (parent/child) and the second is flat

DSF: https://dsf-brownu-policy.pantheonsite.io/dsf-20-policy
Endpoint View: https://dsf-brownu-policy.pantheonsite.io/admin/structure/views/view/dsf_2_0_parent_child/edit/page_7

Health & Wellness Website

Two taxonomy groups: both flat

DSF: https://gl-dsf-brownu-healthwellness.pantheonsite.io/dsf-2
Endpoint View: https://gl-dsf-brownu-healthwellness.pantheonsite.io/admin/structure/views/view/dsf_2_combined

[adam-at-brown]

Waiting on the HTML files for the primary combination variants from OUC to proceed.