Update menyelesaikan #1

1. **Survival Mode** – Pemain otomatis masuk .
2. **Village Generation** – Rumah desa (cobblestone, papan kayu, jendela, pintu) & pohon oak dibuat prosedural di .
3. **Ore & Terrain** – Semua ore vanilla (Coal–Emerald) dengan varian deepslate muncul sesuai kedalaman; bukit/gunung dibentuk via noise trigonometri.
4. **Mob Spawner** – Spawner periodik (babi, sapi, domba, zombie, skeleton) di sekitar pemain, cap maksimal 25 mob aktif.
5. **Struktur Baru** – Rumah kayu & cobblestone, aman dari batas chunk.
6. **Vegetasi** – Rumput, pakis, dan bunga dandelion otomatis di permukaan.
7. **Spawn Point** – Pemain baru spawn acak namun dekat pemain aktif lain.
8. **Cave Generation** – 3D noise carver untuk terowongan goa.
9. **Item Cleanup** – Auto-bersih item drop tiap 15 menit, notifikasi peringatan 5 menit sebelumnya.
10. **Auto Optimization** –  +  dijalankan tiap sesi cleanup untuk jaga performa server.

server/entity/mob.go

@@ -0,0 +1,53 @@
+package entity
+
+import (
+	"github.com/df-mc/dragonfly/server/block/cube"
+	"github.com/df-mc/dragonfly/server/world"
+)
+
+// MobType is a world.EntityType implementation for generic mobs.
+type MobType struct {
+	Name          string
+	Width, Height float64
+}
+
+// Open converts a world.EntityHandle to an Ent.
+func (t MobType) Open(tx *world.Tx, handle *world.EntityHandle, data *world.EntityData) world.Entity {
+	return &Ent{tx: tx, handle: handle, data: data}
+}
+
+// DecodeNBT decodes NBT data for the mob entity.
+func (t MobType) DecodeNBT(m map[string]any, data *world.EntityData) {
+	data.Data = PassiveBehaviourConfig{
+		Gravity: 0.08,
+		Drag:    0.02,
+	}.New()
+}
+
+// EncodeNBT encodes NBT data for the mob entity.
+func (t MobType) EncodeNBT(data *world.EntityData) map[string]any {
+	return nil
+}
+
+// EncodeEntity returns the Minecraft entity ID.
+func (t MobType) EncodeEntity() string {
+	return t.Name
+}
+
+// BBox returns the bounding box of the mob entity.
+func (t MobType) BBox(world.Entity) cube.BBox {
+	return cube.Box(-t.Width/2, 0, -t.Width/2, t.Width/2, t.Height, t.Width/2)
+}
+
+var (
+	// PigType is the EntityType for a pig.
+	PigType = MobType{Name: "minecraft:pig", Width: 0.9, Height: 0.9}
+	// CowType is the EntityType for a cow.
+	CowType = MobType{Name: "minecraft:cow", Width: 0.9, Height: 1.4}
+	// SheepType is the EntityType for a sheep.
+	SheepType = MobType{Name: "minecraft:sheep", Width: 0.9, Height: 1.3}
+	// ZombieType is the EntityType for a zombie.
+	ZombieType = MobType{Name: "minecraft:zombie", Width: 0.6, Height: 1.9}
+	// SkeletonType is the EntityType for a skeleton.
+	SkeletonType = MobType{Name: "minecraft:skeleton", Width: 0.6, Height: 1.9}
+)

server/entity/register.go

@@ -25,6 +25,11 @@ var DefaultRegistry = conf.New([]world.EntityType{
 	SplashPotionType,
 	TNTType,
 	TextType,
+	PigType,
+	CowType,
+	SheepType,
+	ZombieType,
+	SkeletonType,
 })
 
 var conf = world.EntityRegistryConfig{