Add ability to navigate to documentation URL for iocage plugins
There is currently no way for a plugin developer to provide a link to any documentation on how to use and/or configure a plugin. The only option is to add some information in the post install notes, and this just provides a small pop-up for notes in plain text format.
It would be great to provide an option to add a URL that points to e.g. the plugin's website or the GitHub's readme.md (or even be hosted in the jail itself) and provide a way to navigate to this URL from within the new UI. If a documentation URL is specified, an additional menu-option would show in the context menu of the Plugins>Installed screen
I imagine this to work very similar to the adminportal URL one can provide in ui.json