feat(v4): UI refresh

[haydenhoang]

Change Summary

• This PR updates the DocSearch Button, Modal, and Sidepanel UI styles to better reflect the Typesense brand identity. The changes include updates to the typesense-docsearch-css package while preserving the flexibility for users to customize their look and feel.

For reference, here is the before:

And here is the after: https://new-typesense-docsearch-ui-demo-rea.vercel.app/

PR Checklist

• I have read and signed the Contributor License Agreement.

[tharropoulos]

two general things

• lint:css goes from 277 to 345 errors with this change (most are autofixable with --fix),
• 3 of the css files lost their trailing newline

[haydenhoang]

Thanks for the detailed review @tharropoulos! I've addressed the comments and pushed the updates. Let me know if anything else needs adjustment.

[tharropoulos]

thanks for the quick turnaround. one thing to settle before merge is the --fix converting media queries to range syntax (width <= 768px), which needs chrome 104 / safari 16.4 / firefox 102. between that and the prefix removals it's probably worth adding autoprefixer and browserslist to build-css.js so compat is explicit, postcss is already in the pipeline there

[haydenhoang]

I added autoprefixer and browserslist, and also added @csstools/postcss-media-minmax so we can continue to use the modern media query range syntax and it will be converted back to min/max-width syntax during the CSS build.

Browserslist is explicitly set to > 0.5%, last 2 versions, Firefox ESR, not dead, this is the current defaults.

Also updated workpace yarn to v4.18.0 and setnpmMinimalAgeGate: 3d

[tharropoulos]

🙌