feat: Implement Search User for Payment Feature

[fonkamloic]

Description:
We want a search feature that allows users to find and select a recipient for payment by searching for their email, name, or identifier.

Acceptance Criteria:

• Users should be able to access the search feature from the Payment screen
• The app should be able to search for users by email, name, or identifier
• A list of matching users should be displayed for the user to select from
• The selected user's information should be automatically populated in the payment details
• The user should be able to confirm and complete the payment
• The app should validate the email address, identifier, or name before the search
• More than one user could be selected during a search

Screenshots or Wireframes: