Button to send another verification email

https://redmine.teklia.com/issues/7318

Requires backend#1760 (closed)

Please add a new sendVerificationEmail action in the auth store, which calls the SendVerificationEmail endpoint.

When this endpoint succeeds, the store action shows a success notification, and when it fails, it shows an error notification.

In the user profile page (/user/profile), when the user's email is not yet verified, a Resend verification email button should be displayed next to the user's email. Clicking it calls auth/sendVerificationEmail.

In App.vue, on the unverified email warning, please add a link that also calls the sendVerificationEmail action when clicked, something like "Please check your mailbox, or resend the verification email."

In the email verification page, on the error message that states the link is invalid, please add a link to call sendVerificationEmail.