added ui rendering

funnyassets/gfx_shaders/fgui_text_vert.slang

@@ -13,6 +13,7 @@ VertexOutput _main(
 {
 	VertexOutput output;
 	output.position = float4((input.position*size+position)/resolution*2-1, 0, 1.0f);
+	output.uv = input.uv;
 	FIX_VERTEX_POSITION(output.position);
 	return output;
 }