Hidden Armor

Should now work fine on recent versions.

• Fixed a bug where the armor description when hidden would not show up on more recent versions.
• Before permissions would not updating upon reload command, thus needing a server restart. This is now changed to work upon reload command.
• A lot of code refactoring were done, so new bugs introduced (probably).

Please, report any bugs found on the issues page.

• Fixed armor stop hiding after rejoin;
• Added command tab completion;
• Some code optimization;
• Modified language files.

First upload to Modrinth.