add feedback endpoint (#28) and some other stuff

src/routes/feedback/[...url_hash]/+page.server.ts

@@ -0,0 +1,18 @@
+import type { PageServerLoad } from './$types';
+import { Feedback } from '$lib/server/database';
+import { redirect } from '@sveltejs/kit';
+import { env } from '$env/dynamic/public';
+
+export const load: PageServerLoad = async ({ params }) => {
+	const feedback = await Feedback.findOne({
+		where: { url_hash: params.url_hash }
+	});
+
+	if (!feedback) throw redirect(302, `${env.PUBLIC_BASE_PATH}/`);
+
+	return {
+		draft: feedback.content === null,
+		event: feedback.event,
+		anonymous: feedback.user_id === null
+	};
+};