chore(game): add own package for the stamina listener

Author: theEvilReaper

…listener/StaminaStateChangeListener.java …/stamina/StaminaStateChangeListener.javagame/src/main/java/net/onelitefeather/cygnus/listener/StaminaStateChangeListener.java renamed to game/src/main/java/net/onelitefeather/cygnus/listener/stamina/StaminaStateChangeListener.java game/src/main/java/net/onelitefeather/cygnus/listener/StaminaStateChangeListener.java renamed to game/src/main/java/net/onelitefeather/cygnus/listener/stamina/StaminaStateChangeListener.java

@@ -1,4 +1,4 @@
-package net.onelitefeather.cygnus.listener;
+package net.onelitefeather.cygnus.listener.stamina;
 
 import net.minestom.server.MinecraftServer;
 import net.minestom.server.entity.Player;

game/src/main/java/net/onelitefeather/cygnus/listener/stamina/package-info.java

@@ -0,0 +1,4 @@
+@NotNullByDefault
+package net.onelitefeather.cygnus.listener.stamina;
+
+import org.jetbrains.annotations.NotNullByDefault;