Fixed unresponsive ui during window resize

[zod24]

Issue

fixes #632.

Proposed fix

This issue can be resolved by updating our Window and Layers during window resize event.

[MirrasHue]

Hey Zod, this still has the problem of no updates happening when you just hold the border of the window with the mouse left button. This also causes huge delta times depending on how long you hold the border.

I was able to get around this by updating and rendering in a separate thread, and synchronizing the window resizes using two std::atomic's (it has to be done in the main thread). The only thing that doesn't work with this approach is imgui's viewports (floating windows), which is fine for me given all the other benefits.

https://github.com/MirrasHue/MirrasENGINE/blob/main/MirrasENGINE/src/Core/Application.cpp#L120