feat: add ts solution to lc problem: No.2727 (doocs#1471)

Author: thinkasany

solution/2700-2799/2727.Is Object Empty/README.md

@@ -77,6 +77,12 @@ function isEmpty(obj: Record<string, any> | any[]): boolean {
 }
 ```
 
+```ts
+function isEmpty(obj: Record<string, any> | any[]): boolean {
+    return Object.keys(obj).length === 0;
+}
+```
+
 ### **JavaScript**
 
 ```js

solution/2700-2799/2727.Is Object Empty/README_EN.md

@@ -63,6 +63,12 @@ function isEmpty(obj: Record<string, any> | any[]): boolean {
 }
 ```
 
+```ts
+function isEmpty(obj: Record<string, any> | any[]): boolean {
+    return Object.keys(obj).length === 0;
+}
+```
+
 ### **JavaScript**
 
 ```js