- Implemented `set_contacts` method to safely set phone, telegram, and email fields.
- Made contact fields (`phone`, `telegram`, `email`) private and accessible only through `set_contacts`.
- Added validation within `set_contacts` to ensure contact fields are correctly formatted.
- Modified the `initialize` method to utilize `set_contacts` for setting contact values during object creation.
- Added checks in the `validate` method to ensure Git presence and at least one contact method.
- Updated test cases in `main.rb` to demonstrate correct and incorrect uses of contact modifications.
- Ensured that contact fields cannot be modified directly, maintaining data integrity.