feat: add global request search with keyboard shortcut

[AdriiiPRodri]

Description

This PR introduces a global request search feature that allows users to quickly find and open any request across all open collections using a keyboard shortcut (CMD+Shift+A on Mac, Ctrl+Shift+A on Windows/Linux).

What's New

• Quick Access Modal: A search modal that appears instantly with the keyboard shortcut, similar to the "Search Tabs" functionality in Postman and other modern API clients
• Smart Search: Fuzzy search across request names, URLs, and HTTP methods with intelligent result ranking that prioritizes exact matches and word boundaries
• Keyboard Navigation: Full keyboard support - navigate with arrow keys, open with Enter, close with ESC
• Visual Consistency: HTTP method badges use Bruno's existing theme colors for perfect integration

Why This Matters

Navigating large API collections can be time-consuming when manually browsing through nested folders in the sidebar. This feature dramatically improves productivity by allowing instant access to any request, especially useful when:

• You know the request name but not its location
• Switching frequently between endpoints during development
• Exploring unfamiliar API collections
• Working with deeply nested folder structures

Implementation Details

The feature integrates seamlessly with Bruno's existing architecture:

• Uses the Modal component pattern consistent with other Bruno modals
• Follows the established keyboard shortcut system via the Hotkeys provider
• Leverages Redux for state management and tab operations
• Applies Bruno's theming system for dark/light mode support

Evidence

bruno-search.mov

Contribution Checklist:

• The pull request only addresses one issue or adds one feature.
• The pull request does not introduce any breaking changes
• I have added screenshots or gifs to help explain the change if applicable.
• I have read the contribution guidelines.
• Create an issue and link to the pull request. Related with Global Request Search with Keyboard Shortcut #5443