Fixes Issue #446 - Split arguments are loaded correctly from yaml

[jbdamask]

Added the following code at line 161:

                  // If the operation type is 'split', preserve the method_kwargs object
                  if (type === "split") {
                    if (op.method_kwargs) {
                      stringifiedKwargs.method_kwargs = op.method_kwargs;
                    } else if (stringifiedKwargs.method_kwargs) {
                      // Handle case where method_kwargs might have been stringified
                      try {
                        if (typeof stringifiedKwargs.method_kwargs === "string") {
                          stringifiedKwargs.method_kwargs = JSON.parse(stringifiedKwargs.method_kwargs);
                        }
                      } catch (e) {
                        console.error("Error parsing stringified method_kwargs:", e);
                      }
                    }
                  }