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/InputCode.h

@@ -1,7 +1,5 @@
 #pragma once
 
-#include "copium/util/Enum.h"
-
 #define CP_MOUSE_LEFT           0
 #define CP_MOUSE_RIGHT          1
 #define CP_MOUSE_MIDDLE         2
@@ -128,4 +126,4 @@
 #define CP_KEY_RIGHT_ALT        346
 #define CP_KEY_RIGHT_SUPER      347
 #define CP_KEY_MENU             348
-#define CP_KEY_UNBOUND          0xffffffff
+#define CP_KEY_UNBOUND          0x0fffffff