Add J# (#1222)

* add j# to readme

* Create J#.jsl

* Update readme.md

Co-authored-by: MrBrain295 <66077254+MrBrain295@users.noreply.github.com>

j/J#.jsl

@@ -0,0 +1,9 @@
+package HelloWorld;
+
+public class HelloWorld
+{
+	public static void main(String[] args)
+	{
+		System.Console.Write("Hello World");
+	}
+}