feat: Implement Save Money Screen with Saving bucket Selection

[fonkamloic]

Description:
We need to implement a feature that allows users to save money easily by creating saving buckets and inputting the amount they want to save. This feature will be accessible from the main menu and will have the option to select the saving bucket, input the amount, and a save button.

Acceptance Criteria:

• Users should be able to access the "Save Money" screen from the main menu
• The user should be able to select from existing saving buckets or create a new one
• The user should be able to input the amount they want to save
• The user should be able to confirm and complete the save action
• The user should be able to view their current savings balance for each bucket

Screenshots