Create Notification Table

[NathanCornelie]

Explanations

Instead of sending msg on the discord server it could be a great indead to have a messages or a Notifications pages on the app when you can display DURING THE EVENT the related information
We should be able to send private notification to user life for warning or sanctions

TODO

• create notification table
• id
• title
• content
• to = team or user or all or admin
• datetime_created
• datetime_updated
• planned_send = to plan a notification like for a game event