feat: add rust solution to lc problem: No.0118 (#1157)

Author: xzhseh

solution/0100-0199/0118.Pascal's Triangle/README.md

@@ -107,6 +107,29 @@ public:
 };
 ```
 
+### **Rust**
+
+```rust
+impl Solution {
+    #[allow(dead_code)]
+    pub fn generate(num_rows: i32) -> Vec<Vec<i32>> {
+        let mut ret_vec: Vec<Vec<i32>> = Vec::new();
+        let mut cur_vec: Vec<i32> = Vec::new();
+
+        for i in 0..num_rows as usize {
+            let mut new_vec: Vec<i32> = vec![1; i + 1];
+            for j in 1..i {
+                new_vec[j] = cur_vec[j - 1] + cur_vec[j];
+            }
+            cur_vec = new_vec.clone();
+            ret_vec.push(new_vec);
+        }
+
+        ret_vec
+    }
+}
+```
+
 ### **Go**
 
 ```go

solution/0100-0199/0118.Pascal's Triangle/README_EN.md

@@ -82,6 +82,29 @@ public:
 };
 ```
 
+### **Rust**
+
+```rust
+impl Solution {
+    #[allow(dead_code)]
+    pub fn generate(num_rows: i32) -> Vec<Vec<i32>> {
+        let mut ret_vec: Vec<Vec<i32>> = Vec::new();
+        let mut cur_vec: Vec<i32> = Vec::new();
+
+        for i in 0..num_rows as usize {
+            let mut new_vec: Vec<i32> = vec![1; i + 1];
+            for j in 1..i {
+                new_vec[j] = cur_vec[j - 1] + cur_vec[j];
+            }
+            cur_vec = new_vec.clone();
+            ret_vec.push(new_vec);
+        }
+
+        ret_vec
+    }
+}
+```
+
 ### **Go**
 
 ```go

solution/0100-0199/0118.Pascal's Triangle/Solution.rs

@@ -0,0 +1,18 @@
+impl Solution {
+    #[allow(dead_code)]
+    pub fn generate(num_rows: i32) -> Vec<Vec<i32>> {
+        let mut ret_vec: Vec<Vec<i32>> = Vec::new();
+        let mut cur_vec: Vec<i32> = Vec::new();
+
+        for i in 0..num_rows as usize {
+            let mut new_vec: Vec<i32> = vec![1; i + 1];
+            for j in 1..i {
+                new_vec[j] = cur_vec[j - 1] + cur_vec[j];
+            }
+            cur_vec = new_vec.clone();
+            ret_vec.push(new_vec);
+        }
+
+        ret_vec
+    }
+}