feat: completely overhaul the auth model

* Cookies are now encrypted JWTs (GHSA-wrqq-v7qw-r5w7)
* Authentication is stored in the SQLite database (auto-migrated)
* Session logic is much cleaner

app/routes/settings/auth-keys/actions.ts

@@ -20,7 +20,7 @@ export async function authKeysAction({
 	}
 
 	const formData = await request.formData();
-	const apiKey = session.get('api_key')!;
+	const apiKey = session.api_key;
 	const action = formData.get('action_id')?.toString();
 	if (!action) {
 		throw data('Missing `action_id` in the form data.', {