feat: Implement Payment with Google Pay

[fonkamloic]

Description:
We want to add an additional payment option for our users by integrating Google Pay into our app. This will allow users to make payments within the app using their Google Pay account.

Acceptance Criteria:

• Users should be able to access the Google Pay option from the Payment screen
• The app should initiate the Google Pay payment flow when the user selects the option
• Users should be able to complete the payment using their Google Pay account
• The app should handle and display any errors or declines in the payment process
• The app should validate the Google Pay account and available balance before the payment
• The app should show the transaction status after the payment.

Screenshots