Allow commands to target offline players (#1022)

* 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>

src/main/java/emu/grasscutter/command/commands/SetStatsCommand.java

@@ -180,11 +180,6 @@ public final class SetStatsCommand implements CommandHandler {
         String statStr;
         String valueStr;
 
-        if (targetPlayer == null) {
-            CommandHandler.sendMessage(sender, translate(sender, "commands.execution.need_target"));
-            return;
-        }
-
         if (args.size() == 2) {
             statStr = args.get(0).toLowerCase();
             valueStr = args.get(1);