feat: add ts solution to lc problem: No.0041 (#1459)

Author: thinkasany

solution/0000-0099/0041.First Missing Positive/README.md

@@ -232,6 +232,17 @@ function firstMissingPositive(nums: number[]): number {
 }
 ```
 
+```ts
+function firstMissingPositive(nums: number[]): number {
+    const set = new Set(nums);
+    let ans = 1;
+    while (true) {
+        if (!set.has(ans)) return ans;
+        ans++;
+    }
+}
+```
+
 ### **Rust**
 
 ```rust

solution/0000-0099/0041.First Missing Positive/README_EN.md

@@ -218,6 +218,17 @@ function firstMissingPositive(nums: number[]): number {
 }
 ```
 
+```ts
+function firstMissingPositive(nums: number[]): number {
+    const set = new Set(nums);
+    let ans = 1;
+    while (true) {
+        if (!set.has(ans)) return ans;
+        ans++;
+    }
+}
+```
+
 ### **Rust**
 
 ```rust