Move build from TSDX to Vite

[jhuleatt]

• Pulls out TSDX, replaces with Vite
• Updates dependencies
• Moves from yarn to npm now that we don't need yarn workspaces
• Uses Vitest instead of Jest
• Updates Firebase CLI to v11, which requires removing Node 12 from our tests since the CLI requires Node 14+
• Running the build locally creates a stats.html file. Open that in the browser to inspect the built bundle

[jhuleatt]

I'm not sure why the Storage tests keep timing out only on Node 14. I can run them locally in Node 14 with no issue.