Basic Layout (#80)

* Basic Layout

 - Merge with main into new branch
 - Most of main content and footer working.
 - Could not get fixed branch of trussworks to `npm install` correctly, so reverted back to public version. (`trussworks/react-uswds#kh-serverside-rendering-fix-1250"`)

TODO:
 - stack sgv warning+cloud icons
 - get timeline image (which as text that needs to scale)
 - localization support
 - move icon includes out of header?
 - start converting elements over to trussworks

* Cleanup

- removed unused styles
- added some better comments

* Revert trussworks to fixed branch
* Update package-lock.json
* Temporarily pointing toward personal fork until SSR issue has been addressed
* Update J40Footer.spec.tsx.snap
* setting jestEnvironment to the proper 'jsdom' value, needed for snapshot tests
* lingering prettier fix
* small version bump

Co-authored-by: Nat Hillard <Nathaniel.K.Hillard@omb.eop.gov>

client/jest.config.js

@@ -1,6 +1,6 @@
 module.exports = {
   preset: 'ts-jest',
-  testEnvironment: 'node',
+  testEnvironment: 'jsdom',
   transform: {
     '^.+\\.[jt]sx?$': '<rootDir>/jest-preprocess.js',
   },