Add /help command and various gameplay fixes

Introduce a HelpCommand (/help) and register it in SpeedHG; add its localized help text and plugin.yml entry. Prevent kit ability use while in gladiator by checking metadata in KitEventDispatcher and add a matching translation key. Early-return in KitCommand during ENDING state. Fix English message in TeamCommand and adjust spacing in LeaderboardMenu lore. Remove an unused import in SpeedHG and add necessary imports.

src/main/resources/languages/en_US.yml

@@ -170,6 +170,8 @@ commands:
     rank_usage: '<red>Usage: /ranking rank <player></red>'
     player_not_found: '<red>Player <name> is not online.</red>'
     rank_info: '<prefix><gray>Player <white><name></white> — <rank> <gray>(<score> RR · <games> games)</gray>'
+  help:
+    message: '<gray>━━━━━ <gradient:red:gold>SpeedHG</gradient> <red>Help</red> ━━━━━</gray><newline><gray>▪</gray> <blue>Discord:</blue> discord.gg/HyZV4CdUgV<newline><gray>▪</gray> <gold>Store:</gold> https://mcscrims.club<newline><white><newline><gray>▪</gray> <yellow>/msg <player> <message></yellow><newline><gray>▪</gray> <yellow>/r <message></yellow><newline><gray>▪</gray> <yellow>/report <player></yellow><newline><gray>▪</gray> <yellow>/leaderboard</yellow><newline><gray>▪</gray> <yellow>/team <invite|accept|deny></yellow><newline><gray>━━━━━ <gradient:red:gold>SpeedHG</gradient> <red>Help</red> ━━━━━</gray>'
 
 scoreboard:
   title: '<gradient:red:gold><bold>SpeedHG</bold></gradient>'
@@ -327,7 +329,7 @@ kits:
         name: '<gray>Cage</gray>'
         description: 'Fight an enemy in a 1v1 above the skies'
     messages:
-      ability_charged: '<yellow>Your ability has been recharged!</yellow>'
+      cannot_use_abilities: '<red>You cannot use abilities while in a gladiator fight!</red>'
 
   goblin:
     name: '<gradient:dark_green:gray><bold>Goblin</bold></gradient>'

src/main/resources/plugin.yml

@@ -23,6 +23,8 @@ permissions:
     default: false
 
 commands:
+  help:
+    description: 'Help Command'
   kit:
     description: 'Select kits via command'
     usage: '/kit <kitName> <playstyle>'