Command Palette should feel like VS Code command palette via screen reader

### Windows Terminal version

1.16.2642

### Windows build number

_No response_

### Other Software

JAWS (but probably repros with other screen readers)

### Steps to reproduce

1. Open command palette
2. type "select"
3. hear "suggestions found XXX"
4. press down
5. reads "select, select all text, ctrl+shift+a"

### Expected Behavior

In step 3, it's ok to hear "suggestions found", but it should be preceded by reading out the top result (what "enter" does). In this case, it should read "select all text, ctrl+shift+a, suggestions found XXX".

Additionally, in step 5, it should not re-read the text box. It should only read "select all text, ctrl+shift+a"

User said that N of M functionality is nice, but generally should be presented at the end. Personally, he said he doesn't care too much for N of M statements so we should prioritize the other stuff, really.

### Actual Behavior

(see above)

Reproduce the issue from the command palette with JAWS by typing "select" and moving through the results. Trace the command palette's screen-reader announcements and adjust them so the top result is announced before the suggestions count and the text box is not repeated; verify both expected behaviors with a screen reader.

Written by the indexing model from the issue text.