Repository reorganisation

Unified kotlin and java into just src/main
Unified the rs09 and core packages
Took all content out of the core package, and placed it into the new content package
Reorganised all source code relating to content to be easier to find and explore

Server/src/main/content/global/skill/slayer/AbyssalDemonNPC.java

@@ -0,0 +1,73 @@
+package content.global.skill.slayer;
+
+import core.game.node.entity.Entity;
+import core.game.node.entity.combat.BattleState;
+import core.game.node.entity.combat.CombatSwingHandler;
+import core.game.node.entity.combat.MeleeSwingHandler;
+import core.game.node.entity.npc.AbstractNPC;
+import core.game.node.entity.player.Player;
+import core.game.world.map.Location;
+import core.game.world.update.flag.context.Graphics;
+import core.plugin.Initializable;
+import core.tools.RandomFunction;
+
+import static core.api.ContentAPIKt.getPathableRandomLocalCoordinate;
+
+/**
+ * Handles the abyssal npc.
+ * @author Vexia
+ */
+@Initializable
+public class AbyssalDemonNPC extends AbstractNPC {
+
+	/**
+	 * The melee swing handler.
+	 */
+	private static final MeleeSwingHandler SWING_HANDLER = new MeleeSwingHandler() {
+
+		@Override
+		public int swing(Entity entity, Entity victim, BattleState state) {
+			if (victim instanceof Player && RandomFunction.random(8) <= 2) {
+				boolean npc = RandomFunction.random(100) <= 50;
+				Entity source = npc ? victim : entity;
+				Entity teleported = npc ? entity : victim;
+				Location loc = getPathableRandomLocalCoordinate(teleported, 1, source.getLocation(), 3);
+				teleported.graphics(Graphics.create(409));
+				teleported.teleport(loc, 1);
+			}
+			return super.swing(entity, victim, state);
+		}
+	};
+
+	/**
+	 * Constructs a new {@Code AbyssalNPC} {@Code Object}
+	 */
+	public AbyssalDemonNPC() {
+		super(-1, null);
+	}
+
+	/**
+	 * Constructs a new {@Code AbyssalNPC} {@Code Object}
+	 * @param id the id.
+	 * @param location the location.
+	 */
+	public AbyssalDemonNPC(int id, Location location) {
+		super(id, location);
+	}
+
+	@Override
+	public CombatSwingHandler getSwingHandler(boolean swing) {
+		return SWING_HANDLER;
+	}
+
+	@Override
+	public AbstractNPC construct(int id, Location location, Object... objects) {
+		return new AbyssalDemonNPC(id, location);
+	}
+
+	@Override
+	public int[] getIds() {
+		return Tasks.ABYSSAL_DEMONS.getNpcs();
+	}
+
+}