Upgrade Instantsearch Router

[Mephistic]

Problem

We're getting a warning to use react-instantsearch-router-nextjs to better handle persisting search state across our Browse Bills/Testimony pages given our tech stack. We've also seen a number of search-related bugs crop up in our testing recently related to search state not being properly preserved and this may be a silver bullet fix. We should absolutely test out this package and see if it helps manage our search issues better.

Success Criteria

• Add the react-instantsearch-router-nextjs to our search library
• Test against the recent search bugs (e.g. filters resetting in the mobile view, losing pagination status when navigating into a search result in Browse Bills and back to the Browse Bills page again, etc).

Related Links

Package: https://www.npmjs.com/package/react-instantsearch-router-nextjs
Routing Hook: (Custom hook for search routing that we use: useRouting.tsx)

[seatuna]

Good news: this is actually an easy change and will allow us to get rid of our custom routing logic.
Bad news: It doesn't fix our navigation issues. I had a suspicion and commented out the hierarchical menu... the hierarchical menu is the problem sadly

[Mephistic]

Thanks for the update! Merritt's got some fixes up for some of the Hierarchical Menu issues - fingers crossed that between this PR and those changes, we get closer to a resolution here.