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>

conduwuit-example.toml

@@ -389,6 +389,13 @@ allow_profile_lookup_federation_requests = true
 # setting this to false may reduce startup time.
 #media_statup_check = true
 
+# OpenID token expiration/TTL in seconds
+#
+# These are the OpenID tokens that are primarily used for Matrix account integrations, *not* OIDC/OpenID Connect/etc
+#
+# Defaults to 3600 (1 hour)
+#openid_token_ttl = 3600
+
 
 ### Generic database options