Marked TagAdapter implementations as final

Ensured all `TagAdapter` implementations are immutable by marking their classes as `final`, improving code safety and design clarity.

Author: NonSwag

nbt/src/main/java/core/nbt/serialization/adapter/AddressAdapter.java

@@ -11,7 +11,7 @@
 import java.net.InetSocketAddress;
 
 @NullMarked
-public class AddressAdapter implements TagAdapter<InetSocketAddress> {
+public final class AddressAdapter implements TagAdapter<InetSocketAddress> {
     public static final AddressAdapter INSTANCE = new AddressAdapter();
 
     @Override

nbt/src/main/java/core/nbt/serialization/adapter/BooleanAdapter.java

@@ -9,7 +9,7 @@
 import org.jspecify.annotations.NullMarked;
 
 @NullMarked
-public class BooleanAdapter implements TagAdapter<Boolean> {
+public final class BooleanAdapter implements TagAdapter<Boolean> {
     public static final BooleanAdapter INSTANCE = new BooleanAdapter();
 
     @Override

nbt/src/main/java/core/nbt/serialization/adapter/ByteAdapter.java

@@ -9,7 +9,7 @@
 import org.jspecify.annotations.NullMarked;
 
 @NullMarked
-public class ByteAdapter implements TagAdapter<Byte> {
+public final class ByteAdapter implements TagAdapter<Byte> {
     public static final ByteAdapter INSTANCE = new ByteAdapter();
 
     @Override

nbt/src/main/java/core/nbt/serialization/adapter/DoubleAdapter.java

@@ -9,7 +9,7 @@
 import org.jspecify.annotations.NullMarked;
 
 @NullMarked
-public class DoubleAdapter implements TagAdapter<Double> {
+public final class DoubleAdapter implements TagAdapter<Double> {
     public static final DoubleAdapter INSTANCE = new DoubleAdapter();
 
     @Override

nbt/src/main/java/core/nbt/serialization/adapter/DurationAdapter.java

@@ -12,7 +12,7 @@
 import java.time.Duration;
 
 @NullMarked
-public class DurationAdapter implements TagAdapter<Duration> {
+public final class DurationAdapter implements TagAdapter<Duration> {
     public static final DurationAdapter INSTANCE = new DurationAdapter();
 
     @Override

nbt/src/main/java/core/nbt/serialization/adapter/EnumAdapter.java

@@ -10,7 +10,7 @@
 import org.jspecify.annotations.NullMarked;
 
 @NullMarked
-public class EnumAdapter<T extends Enum<T>> implements TagAdapter<T> {
+public final class EnumAdapter<T extends Enum<T>> implements TagAdapter<T> {
     private final Class<T> enumClass;
 
     public EnumAdapter(Class<T> enumClass) {

nbt/src/main/java/core/nbt/serialization/adapter/FileAdapter.java

@@ -11,7 +11,7 @@
 import java.io.File;
 
 @NullMarked
-public class FileAdapter implements TagAdapter<File> {
+public final class FileAdapter implements TagAdapter<File> {
     public static final FileAdapter INSTANCE = new FileAdapter();
 
     @Override

nbt/src/main/java/core/nbt/serialization/adapter/FloatAdapter.java

@@ -9,7 +9,7 @@
 import org.jspecify.annotations.NullMarked;
 
 @NullMarked
-public class FloatAdapter implements TagAdapter<Float> {
+public final class FloatAdapter implements TagAdapter<Float> {
     public static final FloatAdapter INSTANCE = new FloatAdapter();
 
     @Override

nbt/src/main/java/core/nbt/serialization/adapter/IntegerAdapter.java

@@ -9,7 +9,7 @@
 import org.jspecify.annotations.NullMarked;
 
 @NullMarked
-public class IntegerAdapter implements TagAdapter<Integer> {
+public final class IntegerAdapter implements TagAdapter<Integer> {
     public static final IntegerAdapter INSTANCE = new IntegerAdapter();
 
     @Override

nbt/src/main/java/core/nbt/serialization/adapter/LongAdapter.java

@@ -9,7 +9,7 @@
 import org.jspecify.annotations.NullMarked;
 
 @NullMarked
-public class LongAdapter implements TagAdapter<Long> {
+public final class LongAdapter implements TagAdapter<Long> {
     public static final LongAdapter INSTANCE = new LongAdapter();
 
     @Override