Add filters as query parameters in UCL URL

Short Description:
Have site router append selected filters to the URL of the use cases list via query parameters so that the link can be shared with filters already selected. For example: `/usecases?procurement=developedInHouse`

User Story: TBD
Acceptance Criteria: TBD

Start by locating the site router and the use cases list, then trace how selected filters are stored and applied. The work is done when selected filters are appended as query parameters such as `/usecases?procurement=developedInHouse` and a shared URL restores those filters.

Written by the indexing model from the issue text.