feat: Add async_test.prox example demonstrating async/await functionality and include trace_log.txt.

Author: ProgrammerKR

examples/async_test.prox

@@ -0,0 +1,20 @@
+// async_test.pxpl
+
+async func add(a, b) {
+    return a + b;
+}
+
+async func mainAsync() {
+    print("Start Async");
+    var t1 = add(10, 20);
+    print("Task created");
+    var res = await t1;
+    print("Result: " + res);
+}
+
+func main() {
+    print("Main Sync");
+    var t = mainAsync();
+    await t; // Sync await (blocking)
+    print("Done");
+}