Implement poll notification in the notification page
Currently the poll notification are missing in the notification page
This needs to be implemented here: https://invent.kde.org/network/tokodon/-/blob/master/src/post.cpp#L253 and also in the ui: https://invent.kde.org/network/tokodon/-/blob/master/src/content/ui/NotificationPage.qml#L94
The official doc can be found here https://docs.joinmastodon.org/entities/Notification/
Edited by Carl Schwan