fix: auto patch workspace folder without space

[khorshuheng]

In older version of AppFlowy, there's no concept of space. As a result, they can't be rendered in AppFlowy Web easily. In this PR, we will attempt to fix such case based on the following logic:

1. If the view that corresponds to the workspace has children, but none of the children are a valid space, or there is no children at all, then create a new space.
2. If there is at least one children, then all the children directly under the workspace view should be moved under the newly created space.

[khorshuheng]

Depends on AppFlowy-IO/AppFlowy-Collab#362 . Once the PR is merged i will update AppFlowy-Collab version to use the commit on the main branch instead of the PR branch.