Add beta site banner (#802)

* Add new BetaBanner and remove legacy Alerts

- add BetaBanner component and test
- update AboutCard test
- remove AlertWrapper component, copy and tests
- remove AlertWrapper from all pages
- add BetaBanner copy and intl
- update logo and color
- add styles using USWDS tokens to globals.scss

* Add Beta pill to header

- refactor Header to use Grid and USWDS
- refactor global.scss to use Grid and USWDS
- updates snapshots

* Move styles from global to modules

- move BetaBanner styles from global to modules
- move J40Header to a folder component and module styles
- add J40Header unit test
- add a design-system.scss file that allows USWDS styles in modules
- updates snapshots

* Update en.json file

* Trigger Build

* Add initial Spanish content

- add README for translation team
- add createSpanishJson script
- add initial version of es.json
- add a spanish string variable to test translation

* Add retry and timeout config to stalled test

* Remove redundant test cases for AboutCard

- update snapshot

* Update BetaBanner description

client/src/components/J40Header/J40Header.module.scss.d.ts

@@ -0,0 +1,17 @@
+declare namespace J40HeaderNamespace {
+    export interface IDatasetCardScss {
+        logoNavRow: string;
+        logo: string;
+        logoTitle: string;
+        title2BetaPill: string;
+        betaPill: string;
+        navLinks: string;
+    }
+  }
+
+declare const DatasetCardScssModule: J40HeaderNamespace.IDatasetCardScss & {
+    /** WARNING: Only available when `css-loader` is used without `style-loader` or `mini-css-extract-plugin` */
+    locals: J40HeaderNamespace.IDatasetCardScss;
+  };
+
+  export = DatasetCardScssModule;