Allow launcher to sort by usage when searching.

### Feature Description

Currently, when you open the launcher, it sorts apps by usage. So if you often open Firefox, it'll be at the top of the list. I'd like the same behavior for when you start typing to search for something.

I'm fine whether this is the default behavior or an option (to me it seems like a reasonable default though).

### Use Case

If I have the launcher open and I see "Firefox, Spotify, Google Chat, ..." and I want to open Google Chat, it can be easier to just type "ch" rather than clicking it with my mouse. Unfortunately, it can be really annoying when suddenly an app called "Characters" that I never open suddenly jumps to the top.

### Compositor(s)

All compositors

### If Other, please specify

_No response_

### Proposed Solution

Resort the list of apps in the launcher by usage after searching.

### Alternatives/Existing Solutions

_No response_

Start by locating the launcher’s search implementation and the existing usage-based app ordering. Compare how the list is ordered before and after typing, then verify that frequent apps remain prioritized for search results without breaking the stated launcher behavior.

Written by the indexing model from the issue text.