feat: add missing metadata converters for entities

```
- Implemented converters for ALLAY, CREAKING, ENDER_PEARL,
  EVOKER_FANGS, GHAST, HAPPY_GHAST, ITEM, MOOSHROOM, PHANTOM,
  POTION, SNOWBALL, and SQUID.
- Verified and updated converters for COW, and added TODO notes
  for correctness checks on certain entities.
```

api/src/main/java/me/tofaa/entitylib/meta/MetaConverterRegistry.java

@@ -49,9 +49,9 @@ final class MetaConverterRegistry {
     MetaConverterRegistry() {
         put(ABSTRACT_WIND_CHARGE, SmallFireballMeta.class, SmallFireballMeta::new); // TODO: Verify correctness
         put(AREA_EFFECT_CLOUD, AreaEffectCloudMeta.class, AreaEffectCloudMeta::new);
+        put(ALLAY, LivingEntityMeta.class, LivingEntityMeta::new); // TODO: Implement
         put(ARMADILLO, ArmadilloMeta.class, ArmadilloMeta::new); // TODO: Verify correctness
         put(ARMOR_STAND, ArmorStandMeta.class, ArmorStandMeta::new);
-        put(ALLAY, LivingEntityMeta.class, LivingEntityMeta::new); // TODO: Implement
         put(ARROW, ArrowMeta.class, ArrowMeta::new);
         put(AXOLOTL, AxolotlMeta.class, AxolotlMeta::new);
         put(BAT, BatMeta.class, BatMeta::new);
@@ -68,8 +68,9 @@ final class MetaConverterRegistry {
         put(CHEST_MINECART, ChestMinecartMeta.class, ChestMinecartMeta::new);
         put(CHICKEN, ChickenMeta.class, ChickenMeta::new);
         put(COD, CodMeta.class, CodMeta::new);
-        put(COW, CowMeta.class, CowMeta::new);
         put(COMMAND_BLOCK_MINECART, CommandBlockMinecartMeta.class, CommandBlockMinecartMeta::new);
+        put(COW, CowMeta.class, CowMeta::new);
+        put(CREAKING, LivingEntityMeta.class, LivingEntityMeta::new); // TODO: Implement
         put(CREEPER, CreeperMeta.class, CreeperMeta::new);
         put(DOLPHIN, DolphinMeta.class, DolphinMeta::new);
         put(DONKEY, DonkeyMeta.class, DonkeyMeta::new);
@@ -79,11 +80,12 @@ final class MetaConverterRegistry {
         put(ELDER_GUARDIAN, ElderGuardianMeta.class, ElderGuardianMeta::new);
         put(END_CRYSTAL, EndCrystalMeta.class, EndCrystalMeta::new);
         put(ENDER_DRAGON, EnderDragonMeta.class, EnderDragonMeta::new);
+        put(ENDER_PEARL, ThrownEnderPearlMeta.class, ThrownEnderPearlMeta::new);
         put(ENDERMAN, EndermanMeta.class, EndermanMeta::new);
         put(ENDERMITE, EndermiteMeta.class, EndermiteMeta::new);
         put(EVOKER, EvokerMeta.class, EvokerMeta::new);
-        put(EYE_OF_ENDER, EyeOfEnderMeta.class, EyeOfEnderMeta::new);
         put(EVOKER_FANGS, EvokerFangsMeta.class, EvokerFangsMeta::new);
+        put(EYE_OF_ENDER, EyeOfEnderMeta.class, EyeOfEnderMeta::new);
         put(FALLING_BLOCK, FallingBlockMeta.class, FallingBlockMeta::new);
         put(FIREBALL, LargeFireballMeta.class, LargeFireballMeta::new); // TODO: Verify correctness
         put(FIREWORK_ROCKET, FireworkRocketMeta.class, FireworkRocketMeta::new);
@@ -91,11 +93,13 @@ final class MetaConverterRegistry {
         put(FOX, FoxMeta.class, FoxMeta::new);
         put(FROG, FrogMeta.class, FrogMeta::new);
         put(FURNACE_MINECART, FurnaceMinecartMeta.class, FurnaceMinecartMeta::new);
+        put(GHAST, GhastMeta.class, GhastMeta::new);
         put(GIANT, GiantMeta.class, GiantMeta::new);
         put(GLOW_ITEM_FRAME, GlowItemFrameMeta.class, GlowItemFrameMeta::new);
         put(GLOW_SQUID, GlowSquidMeta.class, GlowSquidMeta::new);
         put(GOAT, GoatMeta.class, GoatMeta::new);
         put(GUARDIAN, GuardianMeta.class, GuardianMeta::new);
+        put(HAPPY_GHAST, GhastMeta.class, GhastMeta::new); // TODO: Implement
         put(HOGLIN, HoglinMeta.class, HoglinMeta::new);
         put(HOPPER_MINECART, FurnaceMinecartMeta.class, FurnaceMinecartMeta::new);
         put(HORSE, HorseMeta.class, HorseMeta::new);
@@ -103,34 +107,35 @@ final class MetaConverterRegistry {
         put(ILLUSIONER, IllusionerMeta.class, IllusionerMeta::new);
         put(INTERACTION, InteractionMeta.class, InteractionMeta::new);
         put(IRON_GOLEM, IronGolemMeta.class, IronGolemMeta::new);
+        put(ITEM, ItemEntityMeta.class, ItemEntityMeta::new);
         put(ITEM_DISPLAY, ItemDisplayMeta.class, ItemDisplayMeta::new);
         put(ITEM_FRAME, ItemFrameMeta.class, ItemFrameMeta::new);
-        put(ITEM, ItemEntityMeta.class, ItemEntityMeta::new);
         put(LEASH_KNOT, LeashKnotMeta.class, LeashKnotMeta::new);
         put(LIGHTNING_BOLT, LightningBoltMeta.class, LightningBoltMeta::new);
         put(LLAMA, LlamaMeta.class, LlamaMeta::new);
         put(LLAMA_SPIT, LlamaSpitMeta.class, LlamaSpitMeta::new);
         put(MAGMA_CUBE, MagmaCubeMeta.class, MagmaCubeMeta::new);
         put(MARKER, MarkerMeta.class, MarkerMeta::new);
+        put(MOOSHROOM, MooshroomMeta.class, MooshroomMeta::new);
         put(MULE, MuleMeta.class, MuleMeta::new);
         put(OCELOT, OcelotMeta.class, OcelotMeta::new);
         put(PAINTING, PaintingMeta.class, PaintingMeta::new);
         put(PANDA, PandaMeta.class, PandaMeta::new);
-        put(POTION, ThrownPotionMeta.class, ThrownPotionMeta::new);
         put(PARROT, ParrotMeta.class, ParrotMeta::new);
+        put(PHANTOM, PhantomMeta.class, PhantomMeta::new);
         put(PIG, PigMeta.class, PigMeta::new);
         put(PIGLIN, PiglinMeta.class, PiglinMeta::new);
         put(PIGLIN_BRUTE, PiglinBruteMeta.class, PiglinBruteMeta::new);
         put(PILLAGER, PillagerMeta.class, PillagerMeta::new);
         put(PLAYER, PlayerMeta.class, PlayerMeta::new);
         put(POLAR_BEAR, PolarBearMeta.class, PolarBearMeta::new);
+        put(POTION, ThrownPotionMeta.class, ThrownPotionMeta::new);
         put(PRIMED_TNT, PrimedTntMeta.class, PrimedTntMeta::new);
         put(PUFFERFISH, PufferFishMeta.class, PufferFishMeta::new);
         put(RABBIT, RabbitMeta.class, RabbitMeta::new);
         put(RAVAGER, RavagerMeta.class, RavagerMeta::new);
         put(SALMON, SalmonMeta.class, SalmonMeta::new);
         put(SHEEP, SheepMeta.class, SheepMeta::new);
-        put(SNOWBALL, SnowballMeta.class, SnowballMeta::new);
         put(SHULKER, ShulkerMeta.class, ShulkerMeta::new);
         put(SHULKER_BULLET, ShulkerBulletMeta.class, ShulkerBulletMeta::new);
         put(SILVERFISH, SilverfishMeta.class, SilverfishMeta::new);
@@ -140,14 +145,15 @@ final class MetaConverterRegistry {
         put(SMALL_FIREBALL, SmallFireballMeta.class, SmallFireballMeta::new);
         put(SNIFFER, SnifferMeta.class, SnifferMeta::new);
         put(SNOW_GOLEM, SnowGolemMeta.class, SnowGolemMeta::new);
+        put(SNOWBALL, SnowballMeta.class, SnowballMeta::new);
         put(SPAWNER_MINECART, SpawnerMinecartMeta.class, SpawnerMinecartMeta::new);
         put(SPIDER, SpiderMeta.class, SpiderMeta::new);
+        put(SQUID, SquidMeta.class, SquidMeta::new);
         put(STRAY, StrayMeta.class, StrayMeta::new);
         put(STRIDER, StriderMeta.class, StriderMeta::new);
         put(TADPOLE, LivingEntityMeta.class, LivingEntityMeta::new); // TODO: Implement
         put(TEXT_DISPLAY, TextDisplayMeta.class, TextDisplayMeta::new);
         put(THROWN_EXP_BOTTLE, ThrownExpBottleMeta.class, ThrownExpBottleMeta::new);
-        put(ENDER_PEARL, ThrownEnderPearlMeta.class, ThrownEnderPearlMeta::new);
         put(TNT, TntMeta.class, TntMeta::new);
         put(TNT_MINECART, TntMinecartMeta.class, TntMinecartMeta::new);
         put(TRADER_LLAMA, TraderLlamaMeta.class, TraderLlamaMeta::new);