Implement first pass at config loading, /join, /leave commands, tab completion (broken)

src/main/java/gg/malloc/defense/model/Arena.java

@@ -3,8 +3,6 @@ package gg.malloc.defense.model;
 import org.bukkit.World;
 
 public interface Arena {
-  World getWorld();
-  String name();
-  Spawnpoint[] spawnpoints();
-  Spawnpoint bombTarget();
+  Waypoint[] spawnpoints();
+  Waypoint bombTarget();
 }

src/main/java/gg/malloc/defense/model/Game.java

@@ -1,8 +1,6 @@
 package gg.malloc.defense.model;
-import org.bukkit.entity.Entity;
 
 public interface Game {
   int getWaveCount();
   Wave getWave(int waveNumber);
-  default void onMobDamaged(Entity entity) {}
 }

src/main/java/gg/malloc/defense/model/Spawnpoint.java

@@ -1,9 +0,0 @@
-package gg.malloc.defense.model;
-
-import org.bukkit.Location;
-
-public interface Spawnpoint {
-  Location getLocation();
-  String getName();
-  String getID();
-}

src/main/java/gg/malloc/defense/model/Waypoint.java

@@ -0,0 +1,8 @@
+package gg.malloc.defense.model;
+
+public interface Waypoint {
+  double getX();
+  double getY();
+  double getZ();
+  String getName();
+}