Add Linux support

- Add linux build system using MakeGen
- Fix a swapchain validation error, likelydue to my linux system using a
  different vulkan version
- Make DescriptorPool take in amount of descriptors it needs, instead of
  allocating a mass amount for every pool, causing loads of RAM/VRAM usage

CopiumEngine/src/copium/event/MousePressEvent.cpp

@@ -6,7 +6,7 @@ namespace Copium
     : Event{EventType::MousePress}, button{button}
   {}
 
-  int MousePressEvent::GetButton() const 
+  int MousePressEvent::GetButton() const
   {
     return button;
   }