message: Update supportedExtensions.ts
  Add support for the ignore file.
diff: @@ -289,7 +289,7 @@ export const extensions: IFileCollection = {
  { icon: 'sqlite', extensions: ['sqlite', 'sqlite3', 'db3'], format: FileFormat.svg },
  { icon: 'sss', extensions: ['sss'], format: FileFormat.svg },
  { icon: 'style', extensions: [], format: FileFormat.svg },
  - { icon: 'stylelint', extensions: ['.stylelintrc', 'stylelint.config.js'], light: true, filename: true, format: FileFormat.svg },
  + { icon: 'stylelint', extensions: ['.stylelintrc', 'stylelint.config.js', '.stylelintignore'], light: true, filename: true, format: FileFormat.svg },
  { icon: 'stylus', extensions: [], languages: [languages.stylus], format: FileFormat.svg },
  { icon: 'storyboard', extensions: ['storyboard'], format: FileFormat.svg },
  { icon: 'svg', extensions: ['svg'], format: FileFormat.svg },
  