* Refactor how we handle and validate LN ConnectionStrings
* Migrate existing connection string to Internal Node if they are the same. Cleanup some obsolete fields
* Fix typos, remove duplicated method
* Add a InternalNodeRef to LightningSupportedPaymentMethod
* GreenField: Cross-implemenation Lightning Node API
* switch to hard unrsstricted check
* fix
* set LightningPrivateRouteHints in swagger + stores api
* add priv route hint
* rename models and add swagger defs to models