Health Check Plugin

This plugin provides a summary of "health" information about the journal. These elements might indicate problems with the installation, or make it easier for a third party to debug.

The plugin was initially written at the 2024 Minnesota PKP sprint. Thanks to:

• https://github.com/akierig
• https://github.com/busspatrick
• https://github.com/giotta
• https://github.com/asmecher