[Minecraft Modrinth] Keep track of installed plugins/mods and add update functionality

[marekgrebac]

Would it be ever possible to integrate some autoupdate and autocheck for the plugin manager - plugins installed trough the UI?
Since it already knows and checks for the proper version of your server and other details, it should not be mistaken by downloading wrong version or incompatible plugin update.

[H1ghSyst3m]

@marekgrebac Hope this PR #96 is what you looked for

[marekgrebac]

Thank you alot! Tested, working, approved!