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/buffer/IndexBuffer.cpp

@@ -5,7 +5,9 @@
 namespace Copium
 {
   IndexBuffer::IndexBuffer(int indexCount)
-    : Buffer{VK_BUFFER_USAGE_TRANSFER_DST_BIT | VK_BUFFER_USAGE_INDEX_BUFFER_BIT, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT, indexCount * sizeof(uint16_t), 1}, 
+    : Buffer{VK_BUFFER_USAGE_TRANSFER_DST_BIT | VK_BUFFER_USAGE_INDEX_BUFFER_BIT,
+             VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT,
+             indexCount * sizeof(uint16_t), 1},
       indexCount{indexCount}
   {}
 
@@ -24,4 +26,4 @@ namespace Copium
     CP_ASSERT(indices >= 0 && indices <= indexCount, "amount of indices is out of range");
     vkCmdDrawIndexed(commandBuffer, indices, 1, 0, 0, 0);
   }
-}
+}