feat: implement window registry

[iMeaNz]

Objective

We should have a window registry that handles the opening/closure/handling of windows.
Runtime windows should be able to easily access data from other windows (for example the Material Inspector should be able to retrieve the selected Material component in the Inspector Window)
We should also have utils function that allows easy runtime docking.

Acceptance Criteria

• 1. Base feature to create/delete/update documents windows in one central place
• 2. Access from one document window type to another
• 3. Easy docking to another window

Dependencies

No response

Technical Details

No response

Type

Editor