Change event parameters to struct (#704)

* refactor: Refactor messagelayer events

* refactor: Refactor drng events

* fix: Fix messagelayer unit tests

* refactor: Refactor value events

* fix: Fix wrong parameter in TransactionBooked event

* refactor: Fix 

* refactor: Rename event parameter structure for consistency

* refactor: Rename parameters

* fix: Fix message tangle unit tests

* refactor: Refactor messagerequester events

* fix: Minor fix

* refactor: Rename Txn to Transaction

* refactor: Rename OutputIDs in ForkEvent to InputIDs

* refactor: Use the pointer of events structure for consistency

* refactor: Minor fix