feat(skills): add before-and-after
Merged
SH
3mo ago+10+10+01234567890123456789-0-0-0123456789
Adds Vercels before-and-after screenshot skill to the managed catalog and lockfile.
Validated with make skills-install.
Summary by cubic
Added the vercel-labs/before-and-after screenshot skill to the managed catalog and updated skills-lock.json to lock its source for consistent installs.