fix(script): an error is reported if package.json does not exist

[liuseen-l]

Some packages do not have a package.json, so an error will be reported when you run build-all-cjs

[github-actions]

Size Report

Bundles

File	Size	Gzip	Brotli
runtime-dom.global.prod.js	89.4 kB	34 kB	30.7 kB
vue.global.prod.js	146 kB	53.3 kB	47.6 kB

Usages

Name	Size	Gzip	Brotli
createApp	49.7 kB	19.5 kB	17.8 kB
createSSRApp	53.1 kB	20.8 kB	19 kB
defineCustomElement	52 kB	20.2 kB	18.5 kB
overall	63.2 kB	24.4 kB	22.2 kB

[skirtles-code]

The underlying problem here is similar to #9968. The reactivity-transform package has been removed, but it may still be present on your system because it contains uncommitted files (e.g. the output from an old build).

I've encountered this myself a few times when moving back and forth between branches. To fix it you just need to delete the reactivity-transform folder. I'm unclear whether this is a common enough problem to justify trying to fix it, but I suspect any 'fix' would just be a warning to tell people to delete that folder.

[yyx990803]

This is a nice to have since the lingering folder isn't checked in the branches that don't have it, so ignoring it saves the trouble. (we may have such packages in the future)