add /openid/request_token and /openid/userinfo routes

heavily changed and improved by me

Co-authored-by: mikoto <avdb@keemail.me>
Signed-off-by: strawberry <strawberry@puppygock.gay>

src/database/maps.rs

@@ -91,6 +91,7 @@ pub const MAPS: &[&str] = &[
 	"userid_presenceid",
 	"userid_selfsigningkeyid",
 	"userid_usersigningkeyid",
+	"openidtoken_expiresatuserid",
 	"userroomid_highlightcount",
 	"userroomid_invitestate",
 	"userroomid_joined",