message: Update: update the imswitcher.ts to fit the changes in util module
diff: @@ -3,7 +3,8 @@ import { ModeName, Mode } from '../../mode/mode';
  import { existsSync, exists } from 'fs';
  import { configuration } from '../../configuration/configuration';
  import * as vscode from 'vscode';
  -import * as util from '../../util';
  +import * as util from '../../util/util';
  +import { Message } from '../../util/message';
  // InputMethodSwitcher change input method automatically when mode changed
  export class InputMethodSwitcher {
  @@ -75,7 +76,7 @@ export class InputMethodSwitcher {
  private async switchToIM(imKey: string) {
  let switchIMCmd = configuration.autoSwitchInputMethod.switchIMCmd;
  if (!switchIMCmd.includes('{im}')) {
  - util.showError(
  + Message.ShowError(
  'switchIMCmd config in vim.autoSwitchInputMethod is incorrect, \
  it should contain the placeholder {im}'
  );
  @@ -105,7 +106,7 @@ export class InputMethodSwitcher {
  }
  private showCmdNotFoundErrorMessage(cmd: string) {
  - util.showError(
  + Message.ShowError(
  'Unable to find ' + cmd + '. check your "vim.autoSwitchInputMethod" in VSCode setting.'
  );
  this.disableIMSwitch();
  