Allow string values for radio buttons in options menu (#896)

* Allow string values for radio buttons in options menu :D

NOT sure why this wasn't already a thing.... But it's here now

* Fix NaN check

---------

Co-authored-by: Ralty <78720179+Raltyro@users.noreply.github.com>

Author: NebulaStellaNova

source/funkin/options/OptionsMenu.hx

@@ -202,8 +202,8 @@ class OptionsMenu extends TreeMenu {
 						Logs.warn("A radio option requires an \"id\" for option saving.");
 						continue;
 					}
-					var v:Dynamic = Std.parseFloat(node.att.value);
-					options.push(new RadioButton(screen, name, desc, node.att.id, v != null ? v : node.att.value, null, FlxG.save.data, node.has.forId ? node.att.forId : null));
+					var f = Std.parseFloat(node.att.value);
+					options.push(new RadioButton(screen, name, desc, node.att.id, f == Math.NaN ? node.att.value : f, null, FlxG.save.data, node.has.forId ? node.att.forId : null));
 				case 'slider':
 					if (!node.has.id) {
 						Logs.warn("A slider option requires an \"id\" for option saving.");
@@ -223,4 +223,4 @@ class OptionsMenu extends TreeMenu {
 
 		return options;
 	}
-}
+}