Add ru version (#1865)

* Add Russian docs site baseline

* Add Russian localized codebase

* Polish Russian code wording

* Update ru code translation.

* Update code translation and chapter covers.

* Fix pythontutor extraction.

* Add README and landing page.

* placeholder of profiles

* Use figures of English version

* Remove chapter paperbook

ru/codes/c/utils/common_test.c

@@ -0,0 +1,35 @@
+/**
+ * File: include_test.c
+ * Created Time: 2023-01-10
+ * Author: Reanon (793584285@qq.com)
+ */
+
+#include "common.h"
+
+void testListNode() {
+    int nums[] = {2, 3, 5, 6, 7};
+    int size = sizeof(nums) / sizeof(int);
+    ListNode *head = arrToLinkedList(nums, size);
+    printLinkedList(head);
+}
+
+void testTreeNode() {
+    int nums[] = {1, 2, 3, INT_MAX, 5, 6, INT_MAX};
+    int size = sizeof(nums) / sizeof(int);
+    TreeNode *root = arrayToTree(nums, size);
+
+    // print tree
+    printTree(root);
+
+    // tree to arr
+    int *arr = treeToArray(root, &size);
+    printArray(arr, size);
+}
+
+int main(int argc, char *argv[]) {
+    printf("==testListNode==\n");
+    testListNode();
+    printf("==testTreeNode==\n");
+    testTreeNode();
+    return 0;
+}