ISTWCMS-4837: adding templates and stylings for some of our layouts

css/styles.css

source/_patterns/03-layouts/layout/_layout.scss

source/_patterns/03-layouts/layout/_layout.twig

...terns/03-layouts/layout/layout--1-col/_layout--1-col.scss

...tterns/03-layouts/layout/layout--1-col/layout--1-col.twig

...atterns/03-layouts/layout/layout--1-col/layout--1-col.yml

...terns/03-layouts/layout/layout--2-col/_layout--2-col.scss

...tterns/03-layouts/layout/layout--2-col/layout--2-col.twig

...atterns/03-layouts/layout/layout--2-col/layout--2-col.yml

...terns/03-layouts/layout/layout--3-col/_layout--3-col.scss

...tterns/03-layouts/layout/layout--3-col/layout--3-col.twig

...atterns/03-layouts/layout/layout--3-col/layout--3-col.yml

...terns/03-layouts/layout/layout--4-col/_layout--4-col.scss

...tterns/03-layouts/layout/layout--4-col/layout--4-col.twig

...atterns/03-layouts/layout/layout--4-col/layout--4-col.yml

source/_patterns/03-layouts/layout/layout-base.scss

source/_patterns/03-layouts/layout/layout.twig