Initial implementation

[davilima6]

Todo

Considerations for improvements

• add class names to avoid styling bare elements
• replace all direct color usages by design tokens/css variables
• preload batch of questions to avoid displaying "Loading" message after initial page load
• add generator-based find helper to search over map values without allocating an array (similar to this filter helper)
• bump requirements to Node 17 and replace JSON.parse(JSON.stringify(x)) by structuredClone(x)
• add animations for correct/wrong answers and on game over
• setup CI and PR preview deployments, e.g. integrate with CircleCI/Vercel