feat(ko): add the Korean online edition (#2006)

* feat(ko): add the complete Korean online edition

* Use UTF-8 for Python CI output on Windows

* Remove print-book promotion from the Korean site

* fix(ko): preserve emphasis before Korean particles

ko/codes/java/utils/Vertex.java

@@ -0,0 +1,36 @@
+/**
+ * File: Vertex.java
+ * Created Time: 2023-02-15
+ * Author: krahets ([email protected])
+ */
+
+package utils;
+
+import java.util.*;
+
+/* 정점 클래스 */
+public class Vertex {
+    public int val;
+
+    public Vertex(int val) {
+        this.val = val;
+    }
+
+    /* 값의 리스트 vals를 입력받아 정점 리스트 vets 반환 */
+    public static Vertex[] valsToVets(int[] vals) {
+        Vertex[] vets = new Vertex[vals.length];
+        for (int i = 0; i < vals.length; i++) {
+            vets[i] = new Vertex(vals[i]);
+        }
+        return vets;
+    }
+
+    /* 정점 리스트 vets를 입력받아 값의 리스트 vals 반환 */
+    public static List<Integer> vetsToVals(List<Vertex> vets) {
+        List<Integer> vals = new ArrayList<>();
+        for (Vertex vet : vets) {
+            vals.add(vet.val);
+        }
+        return vals;
+    }
+}