feat: Make function interface "serializable"

core/src/main/java/cc/carm/lib/configuration/function/DataConsumer.java

@@ -2,8 +2,10 @@ package cc.carm.lib.configuration.function;
 
 import org.jetbrains.annotations.NotNull;
 
+import java.io.Serializable;
+
 @FunctionalInterface
-public interface DataConsumer<T> {
+public interface DataConsumer<T> extends Serializable {
 
     void accept(@NotNull T data) throws Exception;
 

core/src/main/java/cc/carm/lib/configuration/function/DataFunction.java

@@ -4,10 +4,11 @@ package cc.carm.lib.configuration.function;
 import org.jetbrains.annotations.Contract;
 import org.jetbrains.annotations.NotNull;
 
+import java.io.Serializable;
 import java.util.Objects;
 
 @FunctionalInterface
-public interface DataFunction<T, R> {
+public interface DataFunction<T, R> extends Serializable {
 
     @NotNull R handle(@NotNull T data) throws Exception;
 

core/src/main/java/cc/carm/lib/configuration/function/DataValidator.java

@@ -2,8 +2,10 @@ package cc.carm.lib.configuration.function;
 
 import org.jetbrains.annotations.Nullable;
 
+import java.io.Serializable;
+
 @FunctionalInterface
-public interface DataValidator<T> {
+public interface DataValidator<T> extends Serializable {
 
     void validate(@Nullable T value) throws Exception;
 

core/src/main/java/cc/carm/lib/configuration/function/ValueComposer.java

@@ -4,8 +4,10 @@ package cc.carm.lib.configuration.function;
 import cc.carm.lib.configuration.source.ConfigurationHolder;
 import org.jetbrains.annotations.NotNull;
 
+import java.io.Serializable;
+
 @FunctionalInterface
-public interface ValueComposer<T, U> {
+public interface ValueComposer<T, U> extends Serializable {
 
     /**
      * Accept the value and the data, and then compose the value.

core/src/main/java/cc/carm/lib/configuration/function/ValueHandler.java

@@ -7,10 +7,11 @@ import org.jetbrains.annotations.Contract;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
+import java.io.Serializable;
 import java.util.Objects;
 
 @FunctionalInterface
-public interface ValueHandler<T, R> {
+public interface ValueHandler<T, R> extends Serializable {
 
     @Nullable R handle(@NotNull ConfigurationHolder<?> holder, @NotNull T data) throws Exception;
 

core/src/main/java/cc/carm/lib/configuration/function/ValueValidator.java

@@ -4,8 +4,10 @@ import cc.carm.lib.configuration.source.ConfigurationHolder;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
+import java.io.Serializable;
+
 @FunctionalInterface
-public interface ValueValidator<T> {
+public interface ValueValidator<T> extends Serializable {
 
     void validate(@NotNull ConfigurationHolder<?> holder, @Nullable T value) throws Exception;