feat(api): add fetchFollowData function

.env

@@ -0,0 +1 @@
+VITE_SERVER_URL=https://avl-frontend-exam.herokuapp.com

src/api/fetchFollowData.ts

@@ -0,0 +1,29 @@
+import type { FollowUser } from 'types/follow'
+
+const { VITE_SERVER_URL } = import.meta.env
+
+type Props = {
+	type: 'followers' | 'following'
+	page: number
+	pageSize?: number
+}
+
+type ResponseData = {
+	total: number
+	totalPages: number
+	page: number
+	pageSize: number
+	data: FollowUser[]
+}
+
+export default async function fetchFollowData({
+	type,
+	page,
+	pageSize = 10
+}: Props) {
+	const queryType = type === 'followers' ? 'all' : 'friends'
+	const response = await fetch(
+		`${VITE_SERVER_URL}/api/users/${queryType}?page=${page}&pageSize=${pageSize}`
+	)
+	return (await response.json()) as ResponseData
+}