Add more search options

[micahmo]

Pull Request Description

This PR enhances the search page.

New chips have been added under the text box. (See Gmail for the UI inspiration here.)

1. The search type chip will let you pick what type of objects to search (currently only Communities and Users are supported, but now that this framework is place, others should be easy to add).
2. The sort option has been taken off the text box and placed into a chip here as well.
3. A feed type selector has also been added as the third chip.

In the future, filters by Community and Creator (like the web UI has) can be added as additional chips.

Issue Being Fixed

Issue Number: Related to #273

Screenshots / Recordings

qemu-system-x86_64_S5lplnN5Nh.mp4

Checklist

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

[micahmo]

Updated this to follow the new refactor. Should be good to go!

[CTalvio]

Damn buddy, you're still on fire! I'm catching up on what ya'll been doing.

I think I'd prefer the search options appear in a grid instead of being horizontally scrollable, and then having that grid be collapsed by default behind an "advanced search" button. I think there was some talk of this in matrix, as something like this will be necessary eventually due to the large number of possible options.

Can be another commit though, when I get back into swing I'll likely make a lot commits that are simple cosmetic/UX polish.

[hjiangsu]

Looks good to me. Something to maybe consider in the future is splitting up the logic into smaller widgets (e.g., splitting up the search sort bar) but it's not necessary!