feat: add confidence votes deck

[Gopikrishna19]

As part of our objective/key results, we vote on confidence in finishing the KR by the end of a quarter. And we vote it from 0-10.
We love your app. Please merge this and release it for us to use this feature. It'd be incredibly useful to have it in the dropdown.

[axeleroy]

Hello,

Thank you for you PR! Adding a new deck also requires updating the back-end code: https://github.com/axeleroy/self-host-planning-poker/blob/main/flask/gamestate/deck.py (the back-end saves the deck to the current game and checks that users do not send bogus values)

But I believe you could add new values to the TRUST_VOTE deck instead, as it was added to achieve the same goal (teams in my previous company us this deck to vote on their confidence on achieving sprints objectives during PI Planning)

[Gopikrishna19]

I'll update it per your recommendation.

[Gopikrishna19]

@axeleroy updated. I extended the TRUST_VOTE instead of adding a new one.

[axeleroy]

Great, but you still have to add the new values in the back-end, otherwise it'll just throw an error and won't update the selected value.

[Gopikrishna19]

Gotcha, added that as well.

[Gopikrishna19]

@axeleroy do you require me to add anything else to get this merged? Please let me know :)

[Gopikrishna19]

@axeleroy can this be merged, please?

[Gopikrishna19]

@axeleroy can this be merged so we can use the new changes?