feat: implement share/export feature

[mrwhoknows55]

• Add functionality to copy content and share it with other apps.
• Provide options to export content in different formats (e.g., text, PDF, CSV).
• Ensure compatibility with platform-specific sharing mechanisms (e.g., Android's Intent system).
• Implement a user-friendly interface for selecting and initiating the copy/share/export actions.
• Test thoroughly to ensure proper functioning across different platforms and devices.