vinxi: support "renderAssetUrl" and customized "assetsBase": "base" vite setting breaks solid-start build

I need to be able to pass “base:” setting to vite to be able to prepend it to asset paths. I don’t need it to affect solid app, router or anything else. Just assets, like raw vite does it.

I used it with solid-start 0.3 using a custom patch to detach this setting from router. I started to port app to 0.4 and current versions of solid-start disable babel transformations as soon as I specify base: "http://somehost.com" in vite config which is double weird.