feat: add js solution to lc problem: No.1823

Author: rain84

solution/1800-1899/1823.Find the Winner of the Circular Game/README.md

@@ -147,6 +147,16 @@ function findTheWinner(n: number, k: number): number {
 }
 ```
 
+#### JavaScript
+
+```js
+function findTheWinner(n, k) {
+    if (n === 1) return 1;
+    const res = (findTheWinner(n - 1, k) + k) % n;
+    return res ? res : n;
+}
+```
+
 <!-- tabs:end -->
 
 <!-- solution:end -->

solution/1800-1899/1823.Find the Winner of the Circular Game/README_EN.md

@@ -146,6 +146,16 @@ function findTheWinner(n: number, k: number): number {
 }
 ```
 
+#### JavaScript
+
+```js
+function findTheWinner(n, k) {
+    if (n === 1) return 1;
+    const res = (findTheWinner(n - 1, k) + k) % n;
+    return res ? res : n;
+}
+```
+
 <!-- tabs:end -->
 
 <!-- solution:end -->

solution/1800-1899/1823.Find the Winner of the Circular Game/Solution.js

@@ -0,0 +1,5 @@
+function findTheWinner(n, k) {
+    if (n === 1) return 1;
+    const res = (findTheWinner(n - 1, k) + k) % n;
+    return res ? res : n;
+}