feat(pages): add /application/guilds/join (#2)

hooks/useFetchState.ts

@@ -0,0 +1,15 @@
+import { useState } from 'react'
+
+export const fetchState = ['idle', 'loading', 'error', 'success'] as const
+
+export type FetchState = typeof fetchState[number]
+
+export const useFetchState = (
+  initialFetchState: FetchState = 'idle'
+): [
+  fetchState: FetchState,
+  setFetchState: React.Dispatch<React.SetStateAction<FetchState>>
+] => {
+  const [fetchState, setFetchState] = useState<FetchState>(initialFetchState)
+  return [fetchState, setFetchState]
+}