Stage 2-3: Player states and Killer system

src/main/java/dev/loki/perk/PerkRegistry.java

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+package dev.loki.perk;
+
+import dev.loki.mdbd;
+import dev.loki.perk.killer.BBQChiliPerk;
+import dev.loki.perk.killer.CorruptInterventionPerk;
+import dev.loki.perk.killer.HexRuinPerk;
+import dev.loki.perk.survivor.BorrowedTimePerk;
+import dev.loki.perk.survivor.DeadHardPerk;
+import dev.loki.perk.survivor.SelfCarePerk;
+import dev.loki.perk.survivor.SprintBurstPerk;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class PerkRegistry {
+    private final Map<String, IPerk> perks = new HashMap<>();
+    private final mdbd plugin;
+
+    public PerkRegistry(mdbd plugin) {
+        this.plugin = plugin;
+        registerDefaultPerks();
+    }
+
+    private void registerDefaultPerks() {
+        register(new SelfCarePerk(plugin));
+        register(new DeadHardPerk(plugin));
+        register(new SprintBurstPerk(plugin));
+        register(new BorrowedTimePerk(plugin));
+        register(new HexRuinPerk(plugin));
+        register(new CorruptInterventionPerk(plugin));
+        register(new BBQChiliPerk(plugin));
+    }
+
+    public void register(IPerk perk) {
+        perks.put(perk.getId().toLowerCase(), perk);
+        plugin.getLogger().info("Registered perk: " + perk.getName());
+    }
+
+    public IPerk getPerk(String id) {
+        return perks.get(id.toLowerCase());
+    }
+
+    public Map<String, IPerk> getAllPerks() {
+        return new HashMap<>(perks);
+    }
+
+    public Map<String, IPerk> getPerksByType(PerkType type) {
+        Map<String, IPerk> result = new HashMap<>();
+        for (Map.Entry<String, IPerk> entry : perks.entrySet()) {
+            if (entry.getValue().getType() == type) {
+                result.put(entry.getKey(), entry.getValue());
+            }
+        }
+        return result;
+    }
+
+    public boolean hasPerk(String id) {
+        return perks.containsKey(id.toLowerCase());
+    }
+}