feat: add rust codes for chapter greedy (#646)

* feat: add rust codes for chapter greedy

* Update max_product_cutting.rs

---------

Co-authored-by: Yudong Jin <krahets@163.com>

codes/rust/chapter_greedy/max_capacity.rs

@@ -0,0 +1,36 @@
+/*
+ * File: coin_change_greedy.rs
+ * Created Time: 2023-07-22
+ * Author: night-cruise (2586447362@qq.com)
+ */
+
+/* 最大容量：贪心 */
+fn max_capacity(ht: &[i32]) -> i32 {
+    // 初始化 i, j 分列数组两端
+    let mut i = 0;
+    let mut j = ht.len() - 1;
+    // 初始最大容量为 0
+    let mut res = 0;
+    // 循环贪心选择，直至两板相遇
+    while i < j {
+        // 更新最大容量
+        let cap = std::cmp::min(ht[i], ht[j]) * (j - i) as i32;
+        res = std::cmp::max(res, cap);
+        // 向内移动短板
+        if ht[i] < ht[j] {
+            i += 1;
+        } else {
+            j -= 1;
+        }
+    }
+    res
+}
+
+/* Driver Code */
+fn main() {
+    let ht = [3, 8, 5, 2, 7, 7, 3, 4];
+
+    // 贪心算法
+    let res = max_capacity(&ht);
+    println!("最大容量为 {}", res);
+}