Add autocomplete to "cat" command in smbclient.py

A small contribution to add autocomplete functionality to the `cat command, similar to `cd`.

impacket/examples/smbclient.py

@@ -581,6 +581,9 @@ def do_get(self, filename):
             raise
         fh.close()
 
+    def complete_cat(self, text, line, begidx, endidx):
+        return self.complete_get(text, line, begidx, endidx, include=1)
+
     def do_cat(self, filename):
         if self.tid is None:
             LOG.error("No share selected")