move examples into subfolder, added wasm4 skip_ahead

examples/microw8/plasma.cwa

@@ -0,0 +1,16 @@
+import "env.memory" memory(4);
+import "math.sin" fn sin(f32) -> f32;
+import "math.cos" fn cos(f32) -> f32;
+
+export fn tic(time: i32) {
+    let i: i32;
+    loop screen {
+        let defer x = (i % 320) as f32 / 48 as f32;
+        let defer y = (i / 320) as f32 / 48 as f32;
+        let defer t = time as f32 / 200 as f32;
+
+        i?120 = ((sin(x + sin(y - t / 4 as f32) * 3 as f32 + t / 5 as f32) + sin(y + sin(x - t / 3 as f32) + t / 6 as f32)) * 63 as f32) as i32 + 128;
+
+        branch_if (i := i + 1) < 320*256: screen
+    }
+}