Add chess GUI and move generation

shaders/piece.frag

@@ -0,0 +1,11 @@
+#version 450
+
+layout(set = 0, binding = 0) uniform sampler2D piece_texture;
+
+layout(location = 0) in vec4 frag_color;
+layout(location = 1) in vec2 frag_uv;
+layout(location = 0) out vec4 out_color;
+
+void main() {
+  out_color = texture(piece_texture, frag_uv) * frag_color;
+}