KB size per route analyzer

[jasongitmail]

It'd be cool Svelte offered an npx command to per route KB size stats, similiar to NueJS's screenshot below (I'm not interested in their goal of <14kb per route, per say, just like the easy access to this information and nice visualization.)

Even better would be if such a command accepted a --json flag, so that the result could be used in automation tools like Github Actions.

src