Resolve "2fa"

What does this MR do?

Add 2fa for hospital staff members. 2fa can only be enabled by the the user itself. The admin is able to check on the staff if a specific user has enabled 2fa but is not able to alter this setting for them.

Screenshots

before

after

Does this MR meet the acceptance criteria?

• I have added tests to validate the new functionality.
• I have updated the documentation accordingly.
• I have added translations for all new client-side text. closes #136 (closed)