feat: [FE] useInput 훅 추가

input의 state, change함수를 추상화한 useInput 훅 추가
(#32)

frontEnd/src/hooks/useInput.ts

@@ -0,0 +1,11 @@
+import { useState } from 'react';
+
+export default function useInput(initialValue: string) {
+  const [value, setValue] = useState(initialValue);
+
+  const onChange = (event: React.ChangeEvent<HTMLInputElement>) => {
+    if (event.target) setValue(event.target.value);
+  };
+
+  return { inputValue: value, onChange };
+}