Add extra report notes text field in the report form and send to the endpoint

[ivellios]

In the game session report form from a DM we want to have extra field with report notes that will be displayed on the character (that played the game session) page. Also it will be visible on the game session detail page as well.

We need to add the field to the form and also change the form's behavior to send it to the action endpoint with the rest of the payload.

Blocked by: dnd-al-krk/portal_backend#16

Scenario: Option to check what notes have players that signed up on my table 
Given I am a DM
When I go to the page of any player profile
Then I see a list of extra notes from all the sessions they have played with note on what DM was reporting (was running the game session)

[EmiM]

@ivellios should the report notes be visible to all players or only to dm?

[ivellios]

@EmiM - DM's only :) These are notes dedicated to others running the game to be aware of possible "complications" ;)