added raden launch

library/lib_file_exists.ks

@@ -0,0 +1,20 @@
+// lib_file_exists.ks is a means of checking for optional dependencies, or checking whether a file exists before attempting to run it.
+// Copyright © 2015,2023 KSLib team 
+// Lic. MIT
+
+@LAZYGLOBAL off.
+@CLOBBERBUILTINS off.
+
+function file_exists{
+ parameter fileName.
+ local fileList is list().
+ local found is false.
+ list files in fileList.
+ for file in fileList {
+  if file = fileName {
+   set found to true.
+   break.
+  }
+ }
+ return found.
+}