feat(feature:send-money): implement pay anyone

[biplab1]

Jira Task: 279

Screenshots

pay-anyone-feature.mp4

Phone number not found on UPI, share invite:

pay-anyone-phone-number-not-found-share-invite.mp4

Description

Implements the Pay Anyone screen with the following:

• Recent + All People sections: recent transactions and all contacts on UPI (name, UPI ID, optional avatar).
• Search: real-time filtering by UPI ID, phone number, or name with "Searching..." loader. Results grouped into People, Others, Businesses.
• Contact Picker: selecting a number auto-triggers search.
• No Match State: info message shown when no results found.
• UPI Handle Suggestions: typing '@' after a character shows PSP handle tabs (@ybl, @axl, etc.).
• Combined behavior: smooth, mobile-friendly UI integrating all above.

Note: Dummy values are used for now since backend API clarification is still pending.

• Apply the AndroidStyle.xml style template to your code in Android Studio.

• Run the unit tests with ./gradlew check to make sure you didn't break anything

• If you have multiple commits please combine them into one commit by squashing them.

[biplab1]

Please merge this after #1903