Add texture class and texture test

assets/glsl/texture.frag

@@ -0,0 +1,12 @@
+#version 450 core
+
+layout(location = 0) out vec4 color;
+
+in vec2 v_texCoord;
+
+uniform sampler2D u_texture;
+
+void main()
+{
+	color = texture(u_texture, v_texCoord);
+}

assets/glsl/texture.vert

@@ -0,0 +1,12 @@
+#version 450 core
+
+layout(location = 0) in vec3 a_position;
+layout(location = 1) in vec2 a_texCoord;
+
+out vec2 v_texCoord;
+
+void main()
+{
+	v_texCoord = a_texCoord;
+	gl_Position = vec4(a_position, 1.0f);
+}