Add Sampler

- Add DescriptorSet and DescriptorPool abstractions to support Samplers

Vulkan/res/shaders/shader.vert

@@ -10,10 +10,13 @@ layout(set = 0, binding = 0) uniform SceneUniformBufferObject
 
 layout(location = 0) in vec2 inPosition;
 layout(location = 1) in vec3 inColor;
+layout(location = 2) in vec2 inTexCoord;
 
 layout(location = 0) out vec3 fragColor;
+layout(location = 1) out vec2 fragTexCoord;
 
 void main() {
     gl_Position = ubo.projection * ubo.view * ubo.model * vec4(inPosition.x, 0.0, inPosition.y, 1.0);
     fragColor = inColor;
+	fragTexCoord = inTexCoord;
 }