Storybook: reference ui-icons & ui-pictograms components storybook

After Storybook 6 we can do this https://github.com/storybookjs/storybook/blob/next/MIGRATION.md#60-inline-stories / https://github.com/storybookjs/storybook/pull/9210:

// main.js
module.exports = {
  stories: [`${__dirname}/stories/*.*`],
  addons: [
    '@storybook/addon-roundtrip/register',
    '@storybook/addon-parameter/register',
    '@storybook/addon-preview-wrapper/register',
  ],
  refs: {
    inception: 'https://storybookjs-next.now.sh/dev-kits/iframe.html',
  },
};

I would like to add

• ui-icons (deployed at https://linguala.lng.li/ui-icons/ )
• ui-pictograms (deployed at https://linguala.lng.li/ui-pictograms/ )

Depends on #74 (closed)