[Search] Add keyboard shortcuts and improve clear button UX

Summary

Search is a custom component wrapping InputField with search-specific functionality. Has CSS specificity issues, hardcoded values, and missing UX patterns.

Improvements

3. Add Escape key to clear input

Common search UX pattern — pressing Escape should clear the input and optionally blur it.

4. Improve clear button focus management

After clearing, focus stays on the clear button instead of returning to the input field.

6. Pass event object to onClear callback

onClear() fires without the event object, inconsistent with other event handlers.

7. Default type="search" on input

For semantic HTML, the underlying input should default to type="search".

Moved to Cross-Cutting Issues

The following items have been moved to cross-cutting issues that address them across all components:

• Replace hardcoded CSS values with design tokens (#672)
• Remove !important declarations (#678)

Files

• packages/raystack/raystack/components/search/

Start in packages/raystack/raystack/components/search/ and read the Search component together with its InputField integration. Check the existing component behavior before addressing Escape-to-clear, clear-button focus, event forwarding, and the default search type. Done means these listed interactions work consistently and the moved CSS-token and !important items remain out of scope.