* add new field for event node

* fix

* fix bug

* fix bug

* fix clang

* fix clang format

* fix code format

* add event node implementation

* modify profiler.stop interface

* fix according to review

* fix file mode

* modify class method name in event_node.cc

* modify LLONG_MAX to ULLONG_MAX

* fix ci error

* fix ci error

* add trace event data structure definition

* convert enum item to string for cupti enum explaination

* modify paddle_enforce_eq description