Bump openapi-generator to 7.7.0 (#14)

* bump: openapi-generator to 7.7.0

* fix: remove empty doc comments to silence clippy

* bump: remove unessecary patches fixed by the update

* bump: run generate.sh

patches/InviteMessageType-Display.rs

@@ -1,10 +0,0 @@
-impl std::fmt::Display for InviteMessageType {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        match self {
-            Self::Message => write!(f, "message"),
-            Self::Response => write!(f, "response"),
-            Self::Request => write!(f, "request"),
-            Self::RequestResponse => write!(f, "requestResponse"),
-        }
-    }
-}