Complete Stage 0: Project scaffold

- Fix build.gradle.kts: Java 21, Paper 1.20.6, ProtocolLib 5.3.0
- Add permissions to paper-plugin.yml
- Add ConfigManager with safe yaml loading (no overwrite)
- Add LocationsConfig for all game object coordinates
- Add GameConfig with all balance values
- Update mdbd.java with onEnable/onDisable + ConfigManager
- Mark Stage 0 complete in PLAN.md

src/main/java/dev/loki/config/GameConfig.java

@@ -0,0 +1,176 @@
+package dev.loki.config;
+
+import org.bukkit.configuration.file.FileConfiguration;
+
+public class GameConfig {
+    private final FileConfiguration config;
+
+    public GameConfig(FileConfiguration config) {
+        this.config = config;
+        setDefaults();
+    }
+
+    private void setDefaults() {
+        // Lobby settings
+        setDefault("lobby.min-players", 5);
+        setDefault("lobby.max-players", 5);
+        setDefault("lobby.countdown-seconds", 60);
+        setDefault("lobby.role-assign-delay", 5);
+
+        // Generator settings
+        setDefault("generators.total-count", 7);
+        setDefault("generators.required-count", 5);
+        setDefault("generators.repair-seconds", 80);
+        setDefault("generators.regression-rate", 0.25);
+        setDefault("generators.kick-regression-rate", 2.5);
+        setDefault("generators.kick-duration-seconds", 30);
+
+        // Skill check settings
+        setDefault("skillcheck.zone-size", 0.15);
+        setDefault("skillcheck.rotation-speed", 3.0);
+        setDefault("skillcheck.success-bonus", 5.0);
+        setDefault("skillcheck.fail-penalty", 10.0);
+
+        // Hook settings
+        setDefault("hooks.stage1-seconds", 60);
+        setDefault("hooks.stage2-seconds", 60);
+        setDefault("hooks.struggle-interval", 2);
+        setDefault("hooks.max-hooks", 3);
+
+        // Movement speeds (% of normal)
+        setDefault("movement.killer", 115);
+        setDefault("movement.killer-carry", 92);
+        setDefault("movement.survivor-walk", 100);
+        setDefault("movement.survivor-sprint", 150);
+        setDefault("movement.survivor-crawl", 30);
+        setDefault("movement.exhaustion-duration", 3);
+        setDefault("movement.exhaustion-cooldown", 5);
+
+        // Healing settings
+        setDefault("healing.self-heal-seconds", 30);
+        setDefault("healing.other-heal-seconds", 16);
+        setDefault("healing.medkit-bonus", 0.5);
+
+        // Killer settings
+        setDefault("killer.attack-cooldown", 2.5);
+        setDefault("killer.attack-range", 3.0);
+        setDefault("killer.pallet-stun-seconds", 2.5);
+        setDefault("killer.pallet-break-seconds", 3.0);
+        setDefault("killer.terror-radius", 32);
+
+        // Window vault
+        setDefault("window.vault-survivor-fast", 1.0);
+        setDefault("window.vault-survivor-slow", 1.5);
+        setDefault("window.vault-killer", 1.5);
+
+        // Endgame
+        setDefault("endgame.gate-open-seconds", 20);
+        setDefault("endgame.collapse-seconds", 120);
+        setDefault("endgame.chest-open-seconds", 3);
+
+        // Hatch
+        setDefault("hatch.min-survivors-for-open", 1);
+    }
+
+    private void setDefault(String path, Object value) {
+        if (!config.contains(path)) {
+            config.set(path, value);
+        }
+    }
+
+    public int getMinPlayers() {
+        return config.getInt("lobby.min-players", 5);
+    }
+
+    public int getMaxPlayers() {
+        return config.getInt("lobby.max-players", 5);
+    }
+
+    public int getLobbyCountdown() {
+        return config.getInt("lobby.countdown-seconds", 60);
+    }
+
+    public int getRoleAssignDelay() {
+        return config.getInt("lobby.role-assign-delay", 5);
+    }
+
+    public int getGeneratorTotal() {
+        return config.getInt("generators.total-count", 7);
+    }
+
+    public int getGeneratorRequired() {
+        return config.getInt("generators.required-count", 5);
+    }
+
+    public int getGeneratorRepairSeconds() {
+        return config.getInt("generators.repair-seconds", 80);
+    }
+
+    public double getRegressionRate() {
+        return config.getDouble("generators.regression-rate", 0.25);
+    }
+
+    public double getKickRegressionRate() {
+        return config.getDouble("generators.kick-regression-rate", 2.5);
+    }
+
+    public int getKickDuration() {
+        return config.getInt("generators.kick-duration-seconds", 30);
+    }
+
+    public int getStage1Seconds() {
+        return config.getInt("hooks.stage1-seconds", 60);
+    }
+
+    public int getStage2Seconds() {
+        return config.getInt("hooks.stage2-seconds", 60);
+    }
+
+    public int getMaxHooks() {
+        return config.getInt("hooks.max-hooks", 3);
+    }
+
+    public double getKillerSpeed() {
+        return config.getDouble("movement.killer", 115) / 100.0;
+    }
+
+    public double getKillerCarrySpeed() {
+        return config.getDouble("movement.killer-carry", 92) / 100.0;
+    }
+
+    public double getSurvivorWalkSpeed() {
+        return config.getDouble("movement.survivor-walk", 100) / 100.0;
+    }
+
+    public double getSurvivorSprintSpeed() {
+        return config.getDouble("movement.survivor-sprint", 150) / 100.0;
+    }
+
+    public double getSurvivorCrawlSpeed() {
+        return config.getDouble("movement.survivor-crawl", 30) / 100.0;
+    }
+
+    public int getAttackCooldown() {
+        return (int) (config.getDouble("killer.attack-cooldown", 2.5) * 20);
+    }
+
+    public double getAttackRange() {
+        return config.getDouble("killer.attack-range", 3.0);
+    }
+
+    public int getPalletStunTicks() {
+        return (int) (config.getDouble("killer.pallet-stun-seconds", 2.5) * 20);
+    }
+
+    public int getPalletBreakTicks() {
+        return (int) (config.getDouble("killer.pallet-break-seconds", 3.0) * 20);
+    }
+
+    public int getTerrorRadius() {
+        return config.getInt("killer.terror-radius", 32);
+    }
+
+    public FileConfiguration getConfig() {
+        return config;
+    }
+}