initial jbang example

jbang/hello.java

@@ -0,0 +1,11 @@
+///usr/bin/env jbang "$0" "$@" ; exit $?
+// //DEPS <dependency1> <dependency2>
+
+import static java.lang.System.*;
+
+public class hello {
+
+    public static void main(String... args) {
+        out.println("Hello World");
+    }
+}