#1050 (Phase C) deleted packages/core in favor of @meshtastic/sdk, but the
squash-merge hit a delete/modify conflict with #1097 (which had modified
packages/core/package.json and src/meshDevice.ts), leaving those two files
behind as a broken stub. Its package.json still declared a tsdown build
(entry: "mod.ts") while mod.ts and the rest of the source were gone, so the
'Push to Main CI' build-and-package loop failed with:
Error: Cannot find entry: "mod.ts"
Nothing depends on the workspace @meshtastic/core — the app resolves
@meshtastic/core to the JSR-published @jsr/meshtastic__core@2.6.6 — so finish
the deletion and drop the now-unused pnpm-lock importer.
Verified locally: frozen-lockfile install passes and the full build-and-package
loop builds every package green (sdk, sdk-react, sdk-storage-sqlocal, all
transports).
