feat(css): support css asset in bundle mode and esm/cjs

[SoonIter]

Summary

• set dataUriLimit: 0 as default
• support background: url(./assets/logo.svg)

if user want to keep asset import statement as lib (middle-level artifacts), user should turn on "publicPath": "auto" to keep relative import of asset

// in Rsbuild
output: {
	assetPrefix: 'auto'
}

// in webpack/Rspack
ouput: {
   pubicPath: 'auto'
}

this is not supported in js asset now(only in css asset), so after js asset support, I'll set assetPrefix: 'auto' as default value

I'll do js asset part in web-infra-dev/rspack#8748, remove publicPath: auto runtime code and keep import statement

why publicPath: auto should be default value?

• If users want to set publicPath, it is usually a umd/mf product, but we already have format: 'umd' or format: 'mf' to support, so users should rarely manully configure publicPath

mode/format	esm/cjs	umd	mf
bundle	'auto'	publicPath: '/'	publicPath: '/'
bundleless	'auto'	NIL	NIL

Related links

#570

[codspeed-hq]

CodSpeed Performance Report

Merging #573 will not alter performance

_{Comparing feat/support-css-asset-bundle (f6cc881) with main (72587ed)}

Summary

✅ 5 untouched benchmarks