Add IceMage kit and playstyle support

Introduce a new IceMage kit and wire playstyle support across the plugin. Changes include:

- Add IceMageKit with aggressive/defensive active & passive abilities, item distribution, and lifecycle hooks; caches ability instances and given items to reduce allocations.
- Register IceMageKit in SpeedHG on plugin startup.
- Update KitCommand to require a playstyle argument, validate it, select the kit's playstyle, and provide tab-completion for playstyles.
- Extend KitEventDispatcher with IceMage-specific handlers: spawn a circular volley of snowballs on ability use (cancelling the original projectile), mark spawned snowballs with persistent data, and apply freeze/slow effects on hit.
- Adjust GoblinKit to use a plugin getter and make inner ability classes static to avoid capturing the outer instance.
- Update language lines and plugin.yml usage to reflect the new /kit <kitName> <playstyle> usage.

These changes implement the IceMage feature and ensure proper playstyle selection and event handling while keeping allocations low and behavior consistent.

src/main/kotlin/club/mcscrims/speedhg/command/KitCommand.kt

@@ -1,6 +1,7 @@
 package club.mcscrims.speedhg.command
 
 import club.mcscrims.speedhg.SpeedHG
+import club.mcscrims.speedhg.kit.Playstyle
 import club.mcscrims.speedhg.util.legacySerializer
 import club.mcscrims.speedhg.util.sendMsg
 import org.bukkit.command.Command
@@ -28,7 +29,7 @@ class KitCommand : CommandExecutor, TabCompleter {
 			return true
 		}
 
-		if ( args.isNullOrEmpty() )
+		if ( args.isNullOrEmpty() || args.size < 2 )
 		{
 			player.sendMsg( "commands.kit.usage" )
 			return true
@@ -43,8 +44,18 @@ class KitCommand : CommandExecutor, TabCompleter {
 			return true
 		}
 
+		val playstyle = Playstyle.entries.firstOrNull { it.name.equals( args[1], true ) }
+
+		if ( playstyle == null )
+		{
+			player.sendMsg( "commands.kit.playstyleNotFound", "playstyle" to args[1] )
+			return true
+		}
+
 		plugin.kitManager.selectKit( player, kit )
-		player.sendMsg( "commands.kit.selected", "kit" to legacySerializer.serialize( kit.displayName ))
+		plugin.kitManager.selectPlaystyle( player, playstyle )
+
+		player.sendMsg( "commands.kit.selected", "playstyle" to playstyle.displayName, "kit" to legacySerializer.serialize( kit.displayName ))
 		return true
 	}
 
@@ -61,6 +72,9 @@ class KitCommand : CommandExecutor, TabCompleter {
 		if ( args.size == 1 )
 			return plugin.kitManager.getRegisteredKits().map { it.id }
 
+		if ( args.size == 2 )
+			return Playstyle.entries.map { it.name.lowercase() }
+
 		return listOf()
 	}