Move FormattedText addition into a combined function

src/main/java/carpet/script/value/Value.java

@@ -4,8 +4,6 @@ import carpet.script.exception.InternalExpressionException;
 import com.google.gson.JsonElement;
 import com.google.gson.JsonPrimitive;
 import net.minecraft.nbt.Tag;
-import net.minecraft.text.BaseText;
-import net.minecraft.text.LiteralText;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -83,11 +81,7 @@ public abstract class Value implements Comparable<Value>, Cloneable
         String lstr = this.getString();
         if (o instanceof FormattedTextValue)
         {
-            if (lstr == null)
-                return ((FormattedTextValue) o).clone();
-            BaseText newText = new LiteralText(lstr);
-            newText.append(((FormattedTextValue) o).getText().shallowCopy());
-            return new FormattedTextValue(newText);
+            return FormattedTextValue.combine(this, o);
         }
         if (lstr == null) // null
             return new StringValue(o.getString());