Add keyboard shortcut to focus search bar

[akuligowski9]

Power users expect to be able to jump to search without using the mouse.

Proposed solution
Pressing / anywhere on the page should focus the search input (common pattern used by GitHub, Linear, etc.).

Acceptance criteria

• Pressing / focuses the search bar
• Pressing Escape clears and blurs the search bar
• Does not trigger when typing in another input field

[ShravyaGowda06]

Hi! I would like to work on this issue as my first open-source contribution. Could you please assign it to me?