Enhance ScriptManager to allow CommonJS module support in JavaScript context

src/main/java/net/jstom/script/ScriptManager.java

@@ -41,6 +41,9 @@ public class ScriptManager {
                 .allowHostAccess(HostAccess.ALL)
                 .allowHostClassLookup(s -> true)
                 .allowIO(true)
+                .allowExperimentalOptions(true)
+                .option("js.commonjs-require", "true")
+                .option("js.commonjs-require-cwd", scriptsDir.getAbsolutePath())
                 .build();
 
         context.getBindings("js").putMember("server", api);