Add more info to plugin page

[dollannn]

So I already wrote a review but I cannot emphasize this enough put all the features in the title or description so more can use this awesome plugin, it supports miniMessage format but it is not mentioned anywhere in the plugin description nor in the github landing page, fix that, more need access to this fantastic resource! This is an good replacement for serverlistplus which has been almost depracted for a long time now... These placeholders and minimessage is currently unique use it to your advantage!

[Andre601]

I already added a note regarding formatting on the plugin page and will add MiniMessage formatting as one of the features in the README.

Other than that should this IMO be enough information, as people should check out the wiki for more information (And the configuration does link to the wiki page itself for further instructions).