Add application-specific QR and URL generation support

[chetanr25]

Description

Introduce support for generating QR codes and shareable URLs for common communication and social platforms. Each generator should accept relevant user inputs and output both a QR code and the corresponding copyable link.

This is a master tracking issue for all platform-specific generators and the common hub screen.

Related Sub-Issues

• Create hub screen for application-specific QR generators #3
• WhatsApp QR and URL Generator #12
• SMS QR and URL Generator #11
• Email QR and URL Generator #10
• Phone Call QR and URL Generator #9
• LinkedIn Profile QR and URL Generator #8
• Issue: X Profile QR and URL Generator #7
• Instagram Profile QR and URL Generator #6
• Generic Profile QR and URL Generator #4

Acceptance Criteria

• All generators are accessible through a single hub screen
• Each generator outputs a valid QR code and copyable link
• The architecture supports easy addition of new platforms