Enhancement: Rewrite wizard from scratch

We completely rewrote the wizard from scratch. The new wizard provides greater
flexibility and makes adding new features easier in the future. It has also
been redesigned to improve the user experience.

https://github.com/owncloud/client/issues/9249
https://github.com/owncloud/client/pull/9482
https://github.com/owncloud/client/pull/9563
https://github.com/owncloud/client/pull/9566
https://github.com/owncloud/client/pull/9577
https://github.com/owncloud/client/pull/9596
https://github.com/owncloud/client/pull/9606
https://github.com/owncloud/client/pull/9621
https://github.com/owncloud/client/pull/9629
https://github.com/owncloud/client/pull/9636
https://github.com/owncloud/client/pull/9637
https://github.com/owncloud/client/pull/9642
https://github.com/owncloud/client/pull/9643
https://github.com/owncloud/client/pull/9697
https://github.com/owncloud/client/pull/9720
https://github.com/owncloud/client/pull/9746
