symlink: use new readSymlink if available

+stdlib/+fileio/read_symlink.m

@@ -4,17 +4,23 @@
   p (1,1) string
 end
 
-import java.io.File
-import java.nio.file.Files
-
 r = string.empty;
 
-if ~stdlib.fileio.is_symlink(p) || ~stdlib.fileio.exists(p), return, end
+if isMATLABReleaseOlderThan("R2024b")
+
+if ~stdlib.fileio.is_symlink(p) || ~stdlib.fileio.exists(p)
+  return
+end
 
 r = stdlib.fileio.absolute_path(p);
 
 % https://docs.oracle.com/en/java/javase/21/docs/api/java.base/java/nio/file/Files.html#readSymbolicLink(java.nio.file.Path)
 % must be absolute path
-r = Files.readSymbolicLink(File(r).toPath());
+r = java.nio.file.Files.readSymbolicLink(java.io.File(r).toPath());
 
+else
+  [ok, t] = isSymbolicLink(p);
+  if ok
+    r = t;
+  end
 end