Implement RequestHook

[felipevolpone]

Have a RequestHook would allow us to easily run code after and before each request go to an endpoint or action. As an example, it would be possible have the transaction control into the RequestHook class.

Example of API:

class TransactionRequestHook(RequestHook):
     
     # to check if it should run in the /api/_login request and in the /api/_logout request
     after_authorization = True  # or False 

    def after(self):
        pass

    def before(self):
        pass