feature/UIDS-317 update Alert to support CTA (#319)

* adds example CTA story via message prop

* adds action prop to render nodes within grid layout

* updates Alert.mdx

* WIP adds primary CTA built by component

* WIP changing grid layout for Alert and Toast to support CTA

* update useToast

* adds @fortawesome/free-brands-svg-icons'

* use a tag instead of form input for action

* use primary-action @mixin

* remove google logo

* update primary action margins + use scss variables

* add whitespace nowrap to primary action

* more margin updates

* margin edit woops

* update mdx docs

Author: jasonbasuil

package.json

@@ -33,6 +33,7 @@
   },
   "peerDependencies": {
     "@fortawesome/fontawesome-svg-core": "^1.2.28",
+    "@fortawesome/free-brands-svg-icons": "^5.15.3",
     "@fortawesome/free-regular-svg-icons": "^5.13.0",
     "@fortawesome/free-solid-svg-icons": "^5.13.0",
     "@fortawesome/react-fontawesome": "^0.1.9",
@@ -56,6 +57,7 @@
     "@babel/preset-env": "^7.8.4",
     "@babel/runtime": "^7.12.5",
     "@fortawesome/fontawesome-svg-core": "^1.2.28",
+    "@fortawesome/free-brands-svg-icons": "^5.15.3",
     "@fortawesome/free-regular-svg-icons": "^5.13.0",
     "@fortawesome/free-solid-svg-icons": "^5.13.0",
     "@fortawesome/react-fontawesome": "^0.1.9",