web: add Storybook workspace level commands

Created by: valerybugakov

Context

The default yarn storybook command loads all stories defined in our monorepo. Often it's not required to load all of them to implement a particular feature. Loading only a subset of stories greatly increases Storybook development server performance. This PR introduces the environment variable to load a subset of all stories and a list of predefined npm scripts to use this environment variable.

Changes

• Added STORIES_GLOB environment variable support to the Storybook config to load only a subset of all stories.
• Added npm scripts to start Storybook development server for a particular package.
• Added Storybook section to the web app "Local Development" documentation.

Timings

Examples to better understand the time required for different packages:

yarn storybook

yan storybook:web

yan storybook:branded

yan storybook:wildcard