[FR] create schematic

[r-hannuschka]

As we want to create multiple libs / modules we just have a own schematic which will create default gauguin lib structure so we dont need to do this over and over again for multiple librarys by our own.

Create schematic which do following job for us

• create folder under src/lib/LIBRAY_NAME
• create src/lib/LIBRAY_NAME/public_api.ts file
• create src/lib/LIBRAY_NAME/LIBRARY_NAME.module.ts
• create base component src/lib/LIBRARY_NAME/components/LIBRARY_NAME.component.{html, scss, ts}
• create src/tests/LIBRARY_NAME/
• update src/lib/public_api.ts
• add docs