Add kotlin code for the chapter of hashing (#1104)

* feat(kotlin): add kotlin code for dynamic programming.

* Update knapsack.kt

* feat(kotlin): add kotlin codes for graph.

* style(kotlin): reformatted the codes.

* feat(kotlin): add kotlin codes for the chapter of greedy.

* Update max_product_cutting.kt

* feat(kotlin): add kotlin code for chapter of hashing.

* style(kotlin): modified some comment

* Update array_hash_map.kt

* Update hash_map_chaining.kt

* Update hash_map_chaining.kt

codes/kotlin/chapter_hashing/built_in_hash.kt

@@ -0,0 +1,36 @@
+/**
+ * File: built_in_hash.kt
+ * Created Time: 2024-01-25
+ * Author: curtishd (1023632660@qq.com)
+ */
+
+package chapter_hashing
+
+import utils.ListNode
+
+/* Driver Code */
+fun main() {
+    val num = 3
+    val hashNum = Integer.hashCode(num)
+    println("整数 $num 的哈希值为 $hashNum")
+
+    val bol = true
+    val hashBol = Boolean.hashCode()
+    println("布尔量 $bol 的哈希值为 $hashBol")
+
+    val dec = 3.14159
+    val hashDec = java.lang.Double.hashCode(dec)
+    println("小数 $dec 的哈希值为 $hashDec")
+
+    val str = "Hello 算法"
+    val hashStr = str.hashCode()
+    println("字符串 $str 的哈希值为 $hashStr")
+
+    val arr = arrayOf<Any>(12836, "小哈")
+    val hashTup = arr.contentHashCode()
+    println("数组 ${arr.contentToString()} 的哈希值为 ${hashTup}")
+
+    val obj = ListNode(0)
+    val hashObj = obj.hashCode()
+    println("节点对象 $obj 的哈希值为 $hashObj")
+}