Improve with-algolia-react-instantsearch example and convert to TypeScript

[maxproske]

Converted to TypeScript to match Contribution docs, and updated/simplified the example.

• Replaced stylesheets in Head component with imported styles
• Removed style-loader, css-loader, cross-env, prop-types packages
• Removed custom webpack config

Documentation / Examples

• Make sure the linting passes by running pnpm build && pnpm lint
• The "examples guidelines" are followed from our contributing doc

[balazsorban44]

Thanks, only had a minor comment

[maxproske]

Thank you @balazsorban44. I left a comment above!