add vertexarray, move Sandbox::Demolayer code to EditorLayer

Editor/assets/shaders/shader.glsl

@@ -0,0 +1,32 @@
+#type vertex
+#version 430
+
+layout(location = 0) in vec3 a_Position;
+layout(location = 1) in vec3 a_Normal;
+layout(location = 2) in vec3 a_Tangent;
+layout(location = 3) in vec3 a_Bitangent;
+layout(location = 4) in vec2 a_TexCoord;
+
+uniform mat4 u_MVP;
+
+out vec3 v_Normal;
+
+void main()
+{
+	gl_Position = u_MVP * vec4(a_Position, 1.0);
+	v_Normal = a_Normal;
+}
+
+#type fragment
+#version 430
+
+layout(location = 0) out vec4 finalColor;
+
+//uniform vec4 u_Color;
+
+in vec3 v_Normal;
+
+void main()
+{
+	finalColor = vec4((v_Normal * 0.5 + 0.5), 1.0);// * u_Color.xyz, 1.0);
+}