Refactored project to Typescript

[tannaurus]

Description

It's come up here and there, so I figured I'd put this together to see how the team wants to proceed here. We can also totally close this if we feel it's just unnecessary complexity 🙏

This PR:

• Converts the codebase to TypeScript
• Adds io-ts to deserialize the firebase responses

Workflow changes

Because we're using vite, who boasts itself on "not doing type checking" in an effort to increase build times, you either have to rely on your ide's language server or tsc directly. What works really well for me is running tsc --noEmit --watch inside a terminal that I can keep my eye on while working.

[github-actions]

Visit the preview URL for this PR (updated for commit 42eb376):

https://tcl-77-smart-shopping-list--pr24-tg-typescript-lwiggz45.web.app

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