Fix vulkan linking issues and add iGPU support

- Fix vulkan linking by setting correct VK_LAYER_PATH and correct
  vulkan library path
- Add priority to GPU selection. Prioritizing dedicated GPUs over
  integrated GPUs

CopiumEngine/src/copium/core/Device.h

@@ -38,7 +38,7 @@ namespace Copium
     void SelectPhysicalDevice();
     void InitializeLogicalDevice();
     void InitializeCommandPool();
-    bool IsPhysicalDeviceSuitable(VkPhysicalDevice device);
+    uint32_t GetPhysicalDevicePriority(VkPhysicalDevice device);
     bool CheckDeviceExtensionSupport(VkPhysicalDevice device);
     std::vector<const char*> GetRequiredDeviceExtensions();
   };