Add sort to instance explorer

[micahmo]

Pull Request Description

The PR adds the ability to sort entities in the instance explorer. The "open in browser" button now becomes a sort button when in any section other than "About".

Issue Being Fixed

Issue Number: N/A

Screenshots / Recordings

https://github.com/thunder-app/thunder/assets/7417301/37a1918b-1e3c-42c3-a857-c32697b1f60e

Checklist

• [ ] Did you update CHANGELOG.md?
• [ ] Did you use localized strings where applicable?
• [ ] Did you add semanticLabels where applicable for accessibility?

[micahmo]

Note: This may go away if we implement something more like what's suggested here.

[hjiangsu]

Placing this on hold since we're leaning in the direction of switching Search to Explore!