[FEATURE] Add password security checks

This issue aims to add the implementation for the password field security checks as described in the official [Bootstrap Italia documentation](https://italia.github.io/bootstrap-italia/docs/form/input/#password-con-misuratore-sicurezza-e-suggerimenti).

### Requirements:
- Add a PasswordRequirement service which expose a method which checks all the requirements
- Add the possibility to specify requirements as global requirement or local requirement (for each BitPasswordField component)

### Acceptance Criteria:
- Add tests
- Add documentation
- All existing tests must end successfully

### References
- https://italia.github.io/bootstrap-italia/docs/form/input/#password-con-misuratore-sicurezza-e-suggerimenti