Add 2D Batch renderer

CopiumEngine/res/shaders/renderer.vert

@@ -0,0 +1,17 @@
+#version 450
+
+layout(location = 0) in vec3 inPosition;
+layout(location = 1) in vec3 inColor;
+layout(location = 2) in vec2 inTexCoord;
+layout(location = 3) in int inTexIndex;
+
+layout(location = 0) out vec3 fragColor;
+layout(location = 1) out vec2 fragTexCoord;
+layout(location = 2) out int fragTexIndex;
+
+void main() {
+  gl_Position = vec4(inPosition, 1.0);
+  fragColor = inColor;
+  fragTexCoord = inTexCoord;
+  fragTexIndex = inTexIndex;
+}