Implementing a phone number field in the Tilda profile form

Implement the ability to input a phone number in the user profile editing interface of Tilda. Currently, the form only includes fields for name and email.

The work is divided into three parts:

1. Designing user screens (sketch layouts for all screens needed to add the new feature).
2. Designing API methods (define requests and responses necessary for saving and retrieving the phone number).
3. Designing the database structure (design tables and fields where the phone number will be stored).