Process (scoped) packages prefixed with vsf- through webpack

[zimme]

Related issues

Fixes #2271, #2395

Short description and why it's useful

Any package in node_modules starting with vsf-* or @<scope>/vsf- will be processed by webpack

Screenshots of visual changes before/after (if there are any)

Which environment this relates to

Check your case. In case of any doubts please read about Release Cycle

• Test version (https://test.storefrontcloud.io) - this is a new feature or improvement for Vue Storefront. I've created branch from develop branch and want to merge it back to develop
• RC version (https://next.storefrontcloud.io) - this is a stabilisation fix for Release Candidate of Vue Storefront. I've created branch from release branch and want to merge it back to release
• Stable version (https://demo.storefrontcloud.io) - this is an important fix for current stable version. I've created branch from hotfix or master branch and want to merge it back to hotfix

Upgrade Notes and Changelog

• No upgrade steps required (100% backward compatibility and no breaking changes)
• I've updated the Upgrade notes and Changelog on how to port existing VS sites with this new feature

IMPORTANT NOTICE - Remember to update CHANGELOG.md with description of your change

Contribution and currently important rules acceptance

• I read and followed contribution rules
• I read the TypeScript Action Plan and adjusted my PR according to it
• I read about Vue Storefront Modules and I am aware that every new feature should be a module

[pkarw]

Thanks! Please just update the Changelog please + add a note to the docs (/docs)

[zimme]

Changelog and docs updates done

[zimme]

⚠️ This PR isn't ready for merge, problems has been reported and I'll look into it next week.

Probably tsconfig that needs changes.

[filrak]

Thanks, this is awesome feature!

[pkarw]

@kkdg I belive we should add a note to the docs somewhere about the convention of having the vsf- prefixed modules transpiled by default

[zimme]

Did you guys fix the problem with the tsconfig file that I wrote about?