feat: add rust codes for graph chapter (#598)

* feat: add rust codes for graph chapter

* update: remove Vertex and it's method to vertex.rs

codes/rust/include/vertex.rs

@@ -0,0 +1,21 @@
+/*
+ * File: vertex.rs
+ * Created Time: 2023-07-13
+ * Author: night-cruise (2586447362@qq.com)
+ */
+
+/* 顶点类型 */
+#[derive(Copy, Clone, Hash, PartialEq, Eq)]
+pub struct Vertex {
+    pub val: i32
+}
+
+/* 输入值列表 vals ，返回顶点列表 vets */
+pub fn vals_to_vets(vals: Vec<i32>) -> Vec<Vertex> {
+    vals.into_iter().map(|val| Vertex { val }).collect()
+}
+
+/* 输入顶点列表 vets ，返回值列表 vals */
+pub fn vets_to_vals(vets: Vec<Vertex>) -> Vec<i32> {
+    vets.into_iter().map(|vet| vet.val).collect()
+}