Closes #1395

Summary

• Improve experience of getting and sharing validator results
• Once a job ID is obtained from the server, push it onto the browser history stack as a query parameter (?report=[id]), so that results can be referred to later
• Add handling for these query params to the app:
  • If there's an id in the URL, do a quick ping to see if that report exists
  • If so, show the "ready" status modal
  • If not, show an error with a CTA to "Start Over" (just dismisses the modal)
• In the "ready" status modal:
  • Show some copy advising about 30 days retention
  • Add buttons to copy URLs for HTML and JSON versions of the report

Expected behavior

New "ready" modal

Confirmation of clipboard operation

"error" status modal when trying to load a page with an invalid id in the query

Checklist

• Run the unit tests with gradle test to make sure you didn't break anything
• Format the title like "feat: [new feature short description]". Title must follow the Conventional Commit Specification(https://www.conventionalcommits.org/en/v1.0.0/).
• Linked all relevant issues
• Include screenshot(s) showing how this pull request works and fixes the issue(s)