message: add doc folder support
diff: @@ -16,7 +16,7 @@ export const extensions: IFolderCollection = {
  { icon: 'css', extensions: ['css', '_css'], format: FileFormat.svg },
  { icon: 'dist', extensions: ['dist', 'out', 'export', 'build', 'release'], format: FileFormat.svg },
  { icon: 'docker', extensions: ['docker', '.docker'], format: FileFormat.svg },
  - { icon: 'docs', extensions: ['docs'], format: FileFormat.svg },
  + { icon: 'docs', extensions: ['docs', 'doc'], format: FileFormat.svg },
  { icon: 'elasticbeanstalk', extensions: ['.elasticbeanstalk', '.ebextensions'], format: FileFormat.svg },
  { icon: 'flow', extensions: ['flow'], format: FileFormat.svg },
  { icon: 'fonts', extensions: ['fonts', 'font', 'fnt'], light: true, format: FileFormat.svg },
  