fix: add condition for existence of current_dir (#995)

zellij-server/src/os_input_output.rs

@@ -113,8 +113,10 @@ fn handle_openpty(
     let mut child = unsafe {
         let command = &mut Command::new(cmd.command);
         if let Some(current_dir) = cmd.cwd {
+            if current_dir.exists() {
                 command.current_dir(current_dir);
             }
+        }
         command
             .args(&cmd.args)
             .pre_exec(move || -> std::io::Result<()> {