CypressPackageManager2 is incomplete, a work in progress.
That pretty much says it all.
Two tests are unimplemented, which cover the missing functionality:
- CypressPackageManagerTest>>#testLoadingPackageBranchFromRepository
- CypressPackageManagerTest>>#testLoadingPackageWithGlobalExtensionWhenNotSystemUser
Additionally, the package manager would then need to be provided with a GUI.