bump quicklook sdk loading speed by hosting on static

[softmarshmallow]

loading

• https://storage.googleapis.com/compilation_artifacts/2.11.0-213.1.beta/dart_sdk.js
• https://storage.googleapis.com/compilation_artifacts/2.11.0-213.1.beta/flutter_web.js

takes almost 3 seconds. we can host it on our own cdn or as a static file for better loading speed.

This can speed up the total quicklook loading speed under 1 second.

currently taking

• 2s for comile
• 0.5 s for uploading & launching
• 4 s for loading & pre-warming

total of around 7 seconds. --> to under 2 seconds