v4.0.0

Major update to the developer workflow and templates.

Includes:

• Storybook local development environment
• Simplification of templates to use less JavaScript
• Simplification of documentation

Renames and npm audit fix

Removed node modules audit vulnerabilites, made some renames for better understanding of project. Updated Readme with information how use Salesforce build. Updated gulp version to 4.

SFCC build

Added SFCC slot content type, handlebars template for SFCC integration and updated README file.
Use gulp sfcc to build accelerators with SFCC integration

Path fixes

Fixed sliderHelper path and added slot-icon

Rename templates

Renamed templates to avoid name clashes and visualization fixes