Save CLI package artifacts to an artifact directory

[aly76]

• Add --artifactdir parameter to the Create package commands in the CLI
  • If project directory is specified, the artifact directory is created in the project directory
  • Otherwise the artifact directory will be created in the current working directory
• Create unlocked package no longer manually reads the sfdx-project json to get the package version number
• Default value for --revisionto parameter is HEAD
• Log output variable values
• Fix Delta package path output variable when project directory is specified

[azlam-abdulsalam]

Okie