Feat #266 - Banner Component (#267)

* Feat #7 - Setup structure for Banner, added temporary stories

* Feat #7 - Added space-around and flex-end to styleguide. Adjusted stories. Added icon for closing banner

* Feat #7 - Added close icon to assets, styled component, updated banner stories

* Fixes #266 - Remove inline style for displaying banner, change updating state with function, change p to div and add title class

* Fixes #266 - Remove close icon from assets, changed close button to be IconButton from WC, cleaned up stories

* Fixes #266 - Change type to be required, create iconClasses to dynamically choose icon color, update ttitle color

* Fixes #266 - Update title color, add children to stories template, update test-watch

* Fixes #266 - Update test-watch

* Fixes #266 - Reposition close button

* Fixes #266 - Added utils for themed styles

* Fixes #266 - Update container to support light and dark theme

* Fixes #266 - Added secondary bg using SecondaryBgDecorator

* feat #266 - Update snapshots, bump package v