refactor: prepare compose API

[nilzona]

This PR is about preparing for the compose api described in #181 the dock layout settings in component settings has now been deprecated and they should be moved into a layout property.
A component definition that previously had:

{
   type: 'axis',
   dock: 'right',
   displayOrder: 3
}

Should instead be:

{
   type: 'axis',
   layout: {
      dock: 'right',
      displayOrder: 3
   }
}

Also dock layout engine has been moved and changed somewhat for preparing the compose api.

Checklist

• tests added
• commits conform to the commit guidelines
• documentation updated