How to use the @vuepress/shared-utils.chalk.cyan function in @vuepress/shared-utils

{
				const item = await new LIB.Page( page, this.options, this.context ).get_feed_item();
				
				if ( ! _.isEmpty( item ) )
				{
					this.feed_generator.addItem( item );
					
					out.push( item );
				}
			}
		
			// -----------------------------------------------------------------------
			
			if ( ! _.isEmpty( out ) )
			{
				LIB.LOG.success(`added ${CHALK.cyan( out.length + ' page(s)' )} as feed item(s)`);
			}
		
			// -----------------------------------------------------------------------
			
			return out;
			
		} catch ( err ) {
			
			LIB.LOG.error( err.message );
			
		}
	
	}
	// add_items()

if (hasDefaultExport(content)) {
            destPath = await writeEnhancer(
              moduleId++,
              `export { default } from ${JSON.stringify(enhanceAppFile)}`
            )
          } else {
            destPath = await writeEnhancer(
              moduleId++,
              `import ${JSON.stringify(enhanceAppFile)}`,
              false /* do not contain default export*/
            )
          }
        } else {
          logger.developer(
            chalk.gray(`[${pluginName}] `) +
            `${chalk.cyan(enhanceAppFile)} Not Found.`
          )
        }
      }

      if (destPath) {
        manifest.push(destPath)
      }
    }

    // 2. write entry file.
    await ctx.writeTemp('internal/app-enhancers.js', pathsToModuleCode(manifest))
  }
}

const { args, options: commandoptions } = cli

    logger.debug('global_options', options)
    logger.debug('cli_options', commandoptions)
    logger.debug('cli_args', args)

    const [commandName] = args
    const sourceDir = args[1] ? path.resolve(args[1]) : pwd
    const inferredUserDocsDirectory = await inferUserDocsDirectory(pwd)
    logger.developer('inferredUserDocsDirectory', inferredUserDocsDirectory)
    logger.developer('sourceDir', sourceDir)

    if (inferredUserDocsDirectory && sourceDir !== inferredUserDocsDirectory) {
      logUnknownCommand(cli)
      console.log()
      logger.tip(`Did you miss to specify the target docs dir? e.g. ${chalk.cyan(`vuepress ${commandName} [targetDir]`)}.`)
      logger.tip(`A custom command registered by a plugin requires VuePress to locate your site configuration like ${chalk.cyan('vuepress dev')} or ${chalk.cyan('vuepress build')}.`)
      console.log()
      process.exit(1)
    }

    if (!inferredUserDocsDirectory) {
      logUnknownCommand(cli)
      process.exit(1)
    }

    logger.debug('Custom command', chalk.cyan(commandName))
    CLI({
      async beforeParse (subCli) {
        const app = createApp({
          sourceDir: sourceDir,
          ...options,

registerOption (key, value, pluginName) {
    const option = PLUGIN_OPTION_MAP[key]
    const types = option.types
    const { valid, warnMsg } = assertTypes(value, types)
    if (valid) {
      this.options[option.name].add(pluginName, value)
    } else if (value !== undefined) {
      logger.warn(
        `${chalk.gray(pluginName)} `
        + `Invalid value for "option" ${chalk.cyan(option.name)}: ${warnMsg}`
      )
    }
    return this
  }

content += opts.yuqueLinkHtml || `<br><br><a href="${repoUrl}/${slug}" class="yuque-link"><svg aria-hidden="true" fill="currentColor" height="1em" width="1em" data-icon="yuque" class="" viewBox="64 64 896 896"><path d="M854.6 370.6c-9.9-39.4 9.9-102.2 73.4-124.4l-67.9-3.6s-25.7-90-143.6-98c-117.8-8.1-194.9-3-195-3 .1 0 87.4 55.6 52.4 154.7-25.6 52.5-65.8 95.6-108.8 144.7-1.3 1.3-2.5 2.6-3.5 3.7C319.4 605 96 860 96 860c245.9 64.4 410.7-6.3 508.2-91.1 20.5-.2 35.9-.3 46.3-.3 135.8 0 250.6-117.6 245.9-248.4-3.2-89.9-31.9-110.2-41.8-149.6zm-204.1 334c-10.6 0-26.2.1-46.8.3l-23.6.2-17.8 15.5c-47.1 41-104.4 71.5-171.4 87.6-52.5 12.6-110 16.2-172.7 9.6 18-20.5 36.5-41.6 55.4-63.1 92-104.6 173.8-197.5 236.9-268.5l1.4-1.4 1.3-1.5c4.1-4.6 20.6-23.3 24.7-28.1 9.7-11.1 17.3-19.9 24.5-28.6 30.7-36.7 52.2-67.8 69-102.2l1.6-3.3 1.2-3.4c13.7-38.8 15.4-76.9 6.2-112.8 22.5.7 46.5 1.9 71.7 3.6 33.3 2.3 55.5 12.9 71.1 29.2 5.8 6 10.2 12.5 13.4 18.7 1 2 1.7 3.6 2.3 5l5 17.7c-15.7 34.5-19.9 73.3-11.4 107.2 3 11.8 6.9 22.4 12.3 34.4 2.1 4.7 9.5 20.1 11 23.3 10.3 22.7 15.4 43 16.7 78.7 3.3 94.6-82.7 181.9-182 181.9z"></path></svg> 使用语雀查看</a>`
        }

        const permalink = `/${slug}.html`

        await ctx.addPage({
          content,
          frontmatter,
          permalink
        })

        if (!defaultActionLink) {
          defaultActionLink = permalink
        }

        spinner.succeed(`Retrieved ${chalk.cyan(title)} ... `)
      }

      if (ctx.pages.every(page =&gt; page.path !== '/')) {
        const { home = {} } = opts
        const { actionText, actionLink, heroImage, features, footer } = home

        spinner.info(`Apply default homepage`)
        await ctx.addPage({
          content: '',
          permalink: '/',
          frontmatter: {
            home: true,
            heroImage: heroImage || user.large_avatar_url,
            actionText: actionText || 'Getting Started →',
            actionLink: actionLink || defaultActionLink,
            features: features || undefined,