feat(api): number conversion functional interfaces

DoubleToDoubleFunction, IntToIntFunction

src/main/java/org/auioc/mcmod/arnicalib/api/java/function/DoubleToDoubleFunction.java

@@ -0,0 +1,8 @@
+package org.auioc.mcmod.arnicalib.api.java.function;
+
+@FunctionalInterface
+public interface DoubleToDoubleFunction {
+
+    double applyAsDouble(double value);
+
+}

src/main/java/org/auioc/mcmod/arnicalib/api/java/function/IntToIntFunction.java

@@ -0,0 +1,8 @@
+package org.auioc.mcmod.arnicalib.api.java.function;
+
+@FunctionalInterface
+public interface IntToIntFunction {
+
+    int applyAsInt(int value);
+
+}

src/main/java/org/auioc/mcmod/arnicalib/api/java/function/StringToStringFunction.java

@@ -3,6 +3,6 @@
 @FunctionalInterface
 public interface StringToStringFunction {
 
-    String apply(String t);
+    String applyAsString(String t);
 
 }

src/main/java/org/auioc/mcmod/arnicalib/utils/game/MessageHelper.java

@@ -32,7 +32,7 @@ public MutableComponent create(Component message, boolean withPrefix) {
     }
 
     public MutableComponent create(String key, Object[] args, boolean withPrefix) {
-        return create(TextUtils.translatable(this.i18n.apply(key), args), withPrefix);
+        return create(TextUtils.translatable(this.i18n.applyAsString(key), args), withPrefix);
     }
 
     @Deprecated