examples: add examples/gg/sample_count.v, showing the influence of the sample_count gg.Config parameter

examples/gg/sample_count.v

@@ -0,0 +1,26 @@
+module main
+
+import gg
+import gx
+import os
+
+fn main() {
+	scount := os.args[1] or { '2' }.int()
+	println('> sample count: ${scount}')
+	mut ctx := gg.new_context(
+		bg_color: gx.white
+		window_title: 'sample_count: ${scount}'
+		width: 320
+		height: 240
+		sample_count: scount
+		frame_fn: fn (mut ctx gg.Context) {
+			ctx.begin()
+			ctx.draw_rounded_rect_empty(110, 70, 100, 100, 10, gx.blue)
+			ctx.draw_circle_empty(160, 120, 100, gx.red)
+			ctx.draw_triangle_empty(160, 93, 186, 138, 132, 138, gx.green)
+			ctx.draw_rect_filled(159, 119, 2, 2, gx.black)
+			ctx.end()
+		}
+	)
+	ctx.run()
+}