move contexts all out in own toplevel dir

- rename wizard to book

components/book/reason.tsx

@@ -0,0 +1,26 @@
+import React, { useContext } from 'react'
+import { BookContext } from '../../context/book'
+import Input from '../input'
+
+export default function Contact() {
+  const { state, onChangeEvent } = useContext(BookContext)
+
+  const { purpose, destination } = state.formData
+
+  return (
+    <>
+      <Input
+        label="Zweck der Fahrt"
+        name="purpose"
+        value={purpose}
+        onChange={onChangeEvent}
+      />
+      <Input
+        label="Ziel der Fahrt"
+        name="destination"
+        value={destination}
+        onChange={onChangeEvent}
+      />
+    </>
+  )
+}