* chore: implement 2fa auth
from #2786
* chore: format code
* chore: replace two factor token input with qr-code
* chore: requesting confirmation of setting/removing two-factor authentication
otpauth library was taken from cdnjs
* chore: revert changes in `ClipboardManager`
don't need it.
* chore: removing twoFactor prop in settings page
* chore: remove `twoFactorQr` object in `mounted` function
