Support 'refactor.move' refactoring, to move methods or fields between types

**Describe the solution you'd like**
Swift plugin should offer the  `refactor.move` refactoring, it is common to move methods between classes and it would be useful to have:

<img width="527" height="183" alt="Image" src="https://github.com/user-attachments/assets/f130aa51-8f7c-4969-be73-14b2abff3c9c" />


