[vioarr] implement resizing of windows

[Meulengracht]

Is your feature request related to a problem? Please describe.
Not being able to resize windows properly is quite a blocker for many visual activities, having to restart the system and recompile apps to request a larger window is quite tedious.

Describe the solution you'd like
Resizing support in the traditional windows/linux way, just drag the borders

[Meulengracht]

I'm thinking of the workflow like this for resizing windows:

Client Initiated:
Request Resize to Server => Handle Resize Event => Send WindowResized event to Client

Server Initiated:
Handle Resize => Send WindowResized event to Client

[Meulengracht]

The protocol is defined already and should support resizing quite nicely once we finish the implementation.