feat: add ts solution to lc problem: No.2520 (doocs#1879)

Author: thinkasany

Diff for: solution/2500-2599/2520.Count the Digits That Divide a Number/README.md

@@ -132,6 +132,18 @@ function countDigits(num: number): number {
 }
 ```
 
+```ts
+function countDigits(num: number): number {
+    let ans = 0;
+    for (const s of num.toString()) {
+        if (num % Number(s) === 0) {
+            ans++;
+        }
+    }
+    return ans;
+}
+```
+
 ### **Rust**
 
 ```rust

Diff for: solution/2500-2599/2520.Count the Digits That Divide a Number/README_EN.md

@@ -119,6 +119,18 @@ function countDigits(num: number): number {
 }
 ```
 
+```ts
+function countDigits(num: number): number {
+    let ans = 0;
+    for (const s of num.toString()) {
+        if (num % Number(s) === 0) {
+            ans++;
+        }
+    }
+    return ans;
+}
+```
+
 ### **Rust**
 
 ```rust