[FEATURE] Add password security checks

[albx]

This issue aims to add the implementation for the password field security checks as described in the official Bootstrap Italia documentation.

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