Lodestone

Better ensures that basic environments are present when loading, and improves debug logging.

Content Changes

• Added basic startup logging.
• Logs now have a capitalized logger name.
• The Lodestone class is no longer extendable.
• Added basic debug logging for the environment registry.

Internal Changes

• Basic environment registration now happens during the pre-launch stages of loading.
• Improved basic testing.
• Removed unnecessary mixin manifest.