Implement support for different screen resolutions

[JamesTDG]

For quite a while, Minicraft has been stuck in 4:3, which is almost a square when it comes to resolution. You can go into fullscreen with the application, but the used visual space is still 4:3, I wish for this to be changed, since I want to be capable of seeing more of my world at once. Here's a set of recommended changes to help improve this:

= >Vital< Implement support for multiple different resolutions

= >Optional< Make it possible to zoom in and out, possible limitations can include a maximum of 2x zoomed in and a maximum of ~4x zoomed out. Would be recommended to have zooming disabled in places without any natural light.