feat: add typescript solution to lc problem: No.1791.Find Center of Star Graph (#532)

Author: zhaocchen

solution/1700-1799/1791.Find Center of Star Graph/README.md

@@ -65,6 +65,18 @@ class Solution:
 
 ```
 
+### **TypeScript**
+
+```ts
+function findCenter(edges: number[][]): number {
+    for (let num of edges[0]) {
+        if (edges[1].includes(num)) {
+            return num;
+        }
+    }
+};
+```
+
 ### **...**
 
 ```

solution/1700-1799/1791.Find Center of Star Graph/README_EN.md

@@ -77,6 +77,18 @@ class Solution:
 
 ```
 
+### **TypeScript**
+
+```ts
+function findCenter(edges: number[][]): number {
+    for (let num of edges[0]) {
+        if (edges[1].includes(num)) {
+            return num;
+        }
+    }
+};
+```
+
 ### **...**
 
 ```

solution/1700-1799/1791.Find Center of Star Graph/Solution.ts

@@ -0,0 +1,7 @@
+function findCenter(edges: number[][]): number {
+    for (let num of edges[0]) {
+        if (edges[1].includes(num)) {
+            return num;
+        }
+    }
+};