Update style.css metadata

[dustin-jw]

The theme check plugin can be used to validate themes against a test suite to report any issues with the theme.

We get the following errors reported about our style.css metadata comment:

REQUIRED Text Domain: is missing from your style.css header.
REQUIRED Tested up to: is missing from your style.css header. Also, this should be numbers only, so 5.0 and not WP 5.0
REQUIRED Requires PHP: is missing from your style.css header.
REQUIRED License: is missing from your style.css header.
REQUIRED License URI: is missing from your style.css header.
INFO: Only one text-domain is being used in this theme. Make sure it matches the theme's slug correctly so that the theme will be compatible with WordPress.org language packs. The domain found is .
INFO Tags: is either empty or missing in style.css header.

We should be able to address all of these by more closely matching the twentytwentythree theme.