Replace CRA with Vite

[jamesgeer]

Major changes:

• Replaced "Create React App" with Vite.

Other changes:

• Playwright configured to only download Chromium instead of Firefox, Safari and Chromium.
• Prisma updated, required a different import path for "PrismaClientKnownRequestError".

Reverted: I set up Yarn in this PR but found it required a lot of setup to use and didn't reduce installation times so I reverted the changes.

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CRA to Vite No need to learn anything new, just enjoy the speed.