Convert copy-list-initialization to direct-list-initialization

Good place to see the different types of initialization:
https://en.cppreference.com/w/cpp/language/explicit

inferno/src/inferno/render/renderer.h

@@ -18,9 +18,9 @@ namespace Inferno {
 	class VertexArray;
 
 	struct QuadVertex {
-		glm::vec3 position = { 0.0f, 0.0f, 0.0f };
-		glm::vec4 color = { 1.0f, 1.0f, 1.0f, 1.0f };
-		glm::vec2 textureCoordinates = { 0.0f, 0.0f };
+		glm::vec3 position { 0.0f, 0.0f, 0.0f };
+		glm::vec4 color { 1.0f, 1.0f, 1.0f, 1.0f };
+		glm::vec2 textureCoordinates { 0.0f, 0.0f };
 		float textureIndex = 0; // @Todo get int to pass to fragment correctly
 	};
 

inferno/src/inferno/window.h

@@ -13,10 +13,10 @@ namespace Inferno {
 	class Event;
 
 	struct WindowProperties {
-		std::string title = "Inferno";
+		std::string title { "Inferno" };
 		int width = 1280;
 		int height = 720;
-		std::string fullscreen = "windowed"; // windowed/fullscreen/borderless
+		std::string fullscreen { "windowed" }; // windowed/fullscreen/borderless
 		bool vsync = true;
 	};