Translate all code to English (#1836)

* Review the EN heading format.

* Fix pythontutor headings.

* Fix pythontutor headings.

* bug fixes

* Fix headings in **/summary.md

* Revisit the CN-to-EN translation for Python code using Claude-4.5

* Revisit the CN-to-EN translation for Java code using Claude-4.5

* Revisit the CN-to-EN translation for Cpp code using Claude-4.5.

* Fix the dictionary.

* Fix cpp code translation for the multipart strings.

* Translate Go code to English.

* Update workflows to test EN code.

* Add EN translation for C.

* Add EN translation for CSharp.

* Add EN translation for Swift.

* Trigger the CI check.

* Revert.

* Update en/hash_map.md

* Add the EN version of Dart code.

* Add the EN version of Kotlin code.

* Add missing code files.

* Add the EN version of JavaScript code.

* Add the EN version of TypeScript code.

* Fix the workflows.

* Add the EN version of Ruby code.

* Add the EN version of Rust code.

* Update the CI check for the English version  code.

* Update Python CI check.

* Fix cmakelists for en/C code.

* Fix Ruby comments

en/codes/kotlin/chapter_tree/binary_tree.kt

@@ -0,0 +1,40 @@
+/**
+ * File: binary_tree.kt
+ * Created Time: 2024-01-25
+ * Author: curtishd (1023632660@qq.com)
+ */
+
+package chapter_tree
+
+import utils.TreeNode
+import utils.printTree
+
+/* Driver Code */
+fun main() {
+    /* Initialize binary tree */
+    // Initialize nodes
+    val n1 = TreeNode(1)
+    val n2 = TreeNode(2)
+    val n3 = TreeNode(3)
+    val n4 = TreeNode(4)
+    val n5 = TreeNode(5)
+    // Build references (pointers) between nodes
+    n1.left = n2
+    n1.right = n3
+    n2.left = n4
+    n2.right = n5
+    println("\nInitialize binary tree\n")
+    printTree(n1)
+
+    /* Insert node P between n1 -> n2 */
+    val P = TreeNode(0)
+    // Delete node
+    n1.left = P
+    P.left = n2
+    println("\nAfter inserting node P\n")
+    printTree(n1)
+    // Remove node P
+    n1.left = n2
+    println("\nAfter removing node P\n")
+    printTree(n1)
+}