Change themes via keyboard arrow keys

[deadcoder0904]

Is your feature request related to a problem? Please describe.

Change themes while keyboard arrow keys so u can do back & forth faster. Sometimes I just wanna find a decent-looking theme for a side-project fast & using arrow keys is way faster.

Describe the solution you'd like

Use TanStack Hotkeys - https://tanstack.com/hotkeys/latest

[deadcoder0904]

Looks like #209 was implemented but uses too much boilerplate plus not merged yet. This can be one-shotted via Codex if u give this issue & that PR's plan.