- Rename __PIP_TYPENAME_DECLARE to PIP_REGISTER_TYPENAME across all headers
- Add PIP_DECLARE_TYPENAME(name) macro for in-class type name declaration
- Replace all static const char * __pip_typename__() member functions with PIP_DECLARE_TYPENAME
change subscription logic - now keep subscriptions independently from connecting state. No unregisters on disconnect, but resubscriptions on connect. So one-time subscription on app start and just connect() on lost connection - all subscriptions keeps
1. subscribe now similar to HTTP server, with lambda
2. subscribe topic syntax support all HTTP features as path arguments and wildcards
3. event received() changed to receivedUnhandled() for unhandled messages (should never be called in proper work)
4. internal logic got more complicated, several endpoints may be serviced by single MQTT topic, so nested Map used