feat: Improve button UX

[stefashkaa]

Description

I've implemented new version of button to simplify the user experience. Also, I've made some code refactoring.

Works done

• Improve button UX for all platforms
• Refactor code
• Add theme support (light/dark)

To test this version without building

• Download dist.zip
• Extract files from zip archive
• Open Google Chrome and navigate to chrome://extensions.
• Click "Load unpacked" and select the directory containing the extracted files.

[Copilot]

Pull Request Overview

This PR significantly refactors and improves the button user experience by implementing a comprehensive theme system, creating reusable button components, and streamlining the codebase architecture. The changes introduce light/dark theme support, a new button component system, and improved code organization through better separation of concerns.

Key Changes:

• Implemented comprehensive theme system with light/dark mode support and automatic theme detection
• Created reusable button component with consistent styling and state management across platforms
• Refactored content scripts to use the new component system and improved search session management

Reviewed Changes

Copilot reviewed 24 out of 27 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
src/utils/util_functions.ts	Replaced hardcoded URL with API constant and improved type imports
src/utils/ui/button_theme.ts	New theme system with comprehensive color schemes for light/dark modes
src/utils/theme.ts	Theme detection and change handling utilities
src/types/memButton.ts	Type definitions for the new button component system
src/types/chrome.ts	Chrome extension API type extensions
src/types/browser.ts	Browser type definitions moved from util_functions.ts
src/types/background_search.ts	Background search types extracted from utils
src/types/memory.ts	Added new memory prompt fields for rerank system
src/sidebar.ts	Updated API URLs to use constants instead of hardcoded strings
src/replit/content.ts	Complete rewrite using new button system and improved architecture
src/popup.ts	Updated to use API constants
src/mem0/content.ts	Updated API URLs to use constants
src/grok/content.ts	Complete rewrite using new button system and search session management

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