Fix menu input: name the VSMX script 'main' so button events resolve

Button events in the RCO are named 'script:/main/mm_on_focus_up' etc., but
the interpreter was constructed with name 'menu', so interpretScript built a
'script:/menu/' prefix that never matched and button navigation/selection
silently did nothing. Also route key presses through a scene event filter so
arrow keys reach the handler before JavaFX focus traversal.

cli/src/main/java/dev/quoije/umd/cli/Main.java

@@ -429,7 +429,7 @@ public final class Main {
 
             byte[] vsmxData = rco.vsmxData();
             if (vsmxData != null) {
-                Vsmx vsmx = new Vsmx(vsmxData, "menu");
+                Vsmx vsmx = new Vsmx(vsmxData, "main");
                 System.out.printf("vsmx: %d code groups, %d texts, %d props, %d names%n",
                         vsmx.codes().length, vsmx.texts().length, vsmx.properties().length, vsmx.names().length);