• Cleaned up Zef::Utils::FileSystem and fixed some potential bugs when used differently than the current internal use.
• Made zef search ... case insensitive.
• Disabled ZEF_PLUGIN_DEBUG in CI tests.
• Give a better error message doing zef install $some-path, where $some-path is a directory that doesn't contain a META6.json file.
• Removed support for META.info files.
• Fixed an issue where test (and theoretically also build) phase output was getting duplicated when multiple distributions had output message.