handle user accounts with unverified email addresses properly

[zven]

Description

When I have created a new user account, the email address has the state not verified. In the UI, this state (verified / not verified) is also nowhere to be seen and I can use the whole platform without any restrictions. What I would expect:

• On signup, I am informed that a verification email has been sent to my emal address
• I can access my own account in the settings, change details and delete it but not create new senseboxes and upload data.
• In the Account tab, it is highlighted if my email address is verified or not (similar to the old settings menu).
• I would also expect a Resend verification email that resends a verification email

For reference: Old settings menu:

Use case

The feature would make ensure that only users who actually have access to the email address the sign up with can use our platform.

Implementation ideas (optional)

No response

Additional information (optional)

No response