feat: Implement more sections functions

core/src/main/java/cc/carm/lib/configuration/source/section/ConfigureSection.java

@@ -30,6 +30,15 @@ public interface ConfigureSection {
     @Contract(pure = true)
     @Nullable ConfigureSection parent();
 
+    /**
+     * Get the path separator for the section.
+     *
+     * @return The path separator
+     */
+    default char pathSeparator() {
+        return '.';
+    }
+
     /**
      * Gets if this section is a root section.
      *
@@ -706,6 +715,11 @@ public interface ConfigureSection {
         return stream(path).map(parser);
     }
 
+    default String childPath(String path) {
+        int index = path.indexOf(pathSeparator());
+        return (index == -1) ? path : path.substring(index + 1);
+    }
+
     static <T, C extends Collection<T>> @NotNull C parseCollection(
             @Nullable List<?> data,
             @NotNull Supplier<C> constructor,