added pause menu

pause_menu.gdshader

@@ -0,0 +1,14 @@
+shader_type canvas_item;
+
+uniform sampler2D screen_texture: hint_screen_texture, filter_linear_mipmap;
+uniform float amount: hint_range(0.0,5.0);
+
+void fragment() {
+	vec4 color =textureLod(screen_texture, SCREEN_UV, amount);
+	COLOR = color;
+}
+
+//void light() {
+	// Called for every pixel for every light affecting the CanvasItem.
+	// Uncomment to replace the default light processing function with this one.
+//}