Target Platform

Implements changes to target the platform version retrieved via the registry, or via command line option when building without a registry file.

The command line option to specify the target version when building was previously removed when the .jadegit configuration file was introduced, with the jade.version setting automatically populated/updated during extract. The use of the configuration setting has been refactored so it is now optional, renamed to core.platform, and will now treated as the minimum platform version (further work needed to detect/error when attempting to deploy to an older platform version).

This also adds support for JADE 2022 SP2.