hotkeys: Quote selected text when > hotkey is pressed.

[Signior-X]

Follow up for https://github.com/zulip/zulip/pull/15235 (See this for details on the issue) Rebased and tested.

CZO link here

Testing plan: Tested manually selecting and works as shown in the original PR.

Ignore the search | copy that comes in the gif, it is a browser feature of opera.

[zulipbot]

Heads up @Signior-X, we just merged some commits that conflict with the changes your made in this pull request! You can review this repository's recent commits to see where the conflicts occur. Please rebase your feature branch against the upstream/main branch and resolve your pull request's merge conflicts accordingly.

[timabbott]

This was completed via https://github.com/zulip/zulip/pull/28789.