LevelCode v0.3.0

Draft — not for release as-is. The attached UNSIGNED-LevelCode-<arch>.app.zip
files are CI build artifacts with no Developer ID signature or notarization.

To finish the release locally (your signing cert never touches CI):

1. gh release download v0.3.0 --pattern 'UNSIGNED-*.app.zip'
2. For each arch — unzip into VSCode-darwin-<arch>/, then
   CODESIGN_IDENTITY="Developer ID Application: …" NOTARY_PROFILE=levelcode-notary ./scripts/make-dmg.sh <arch>
   (signs → dmg → notarizes → staples → LevelCode-<arch>.dmg).
3. gh release upload v0.3.0 LevelCode-arm64.dmg LevelCode-x64.dmg
4. Delete the UNSIGNED-*.app.zip assets, add real notes, and publish.

Full runbook: docs/RELEASING.md.