Implement canvas, text & image UI components

[mustauig]

User Problem

Overload doesn't have any support for in-game user interface

Proposed Solution

We should add canvas, text, and image UI components.

Original message

so overload is a pretty good engine with its simplicity but its missing 2 core features which first there should be animation and rig support second a easy to us hud ui maker for things like main menu thank you i hope overload gets these features soon

[adriengivry]

Hi, and thank you for taking the time to open an issue!

We actually already have an issue opened for the skeletal animation: #302

So we'll keep this issue focused on adding in-game user interface