GitLab

* Add targetRequirement annotation for Command

* Added MTL lines for other langs

* Fix TargetRequirement enum scoping

* Adjust commands to targetRequirement system

* Add translation message sugar to prevent future messages from being translated for wrong player

* Temporarily disable offline targeting on /permission and /clear

* Preliminary README cleanup

* Readme commands cleanup

* Clean up command table in README, including column shuffle
Co-authored-by: AnimeGitB <AnimeGitB@bigblueball.in>

Removed invalid code in getLanguageFileDescription,When the language is not discovered, it will use the built-in language fallback mechanism to fall back,At the same time, we also fix the issue that using language in the server does not save the settings of the server side locale

* Fix the following issues:
1. HashMap non-thread-safe issus
2. Fix the same problem in pr621, but use a better implementation

Add the following functions:
1. There is now a language cache inside getLanguage to prepare for different languages corresponding to different time zones where the accounts in the server are located

* add /language command,each account has their own Locate

* I forgot to git add...sorry,,this pr is to fix pr780, uploaded LanguageCommand.java