SocketIO integration

[ColinEspinas]

Use SocketIO to register tasks moving for everyone in realtime.

Here are some references that could be useful:

• https://socket.io/get-started
• Websockets example app tinyhttp/tinyhttp#236
• https://github.com/richardeschloss/nuxt-socket-io

As said above https://github.com/tinyhttp/tinyws might be a better option than SocketIO with tinyhttp.
We might want to try both.

Todo:

• Add socket server to the current api app
• Add SocketIO to web app
• Emit and broadcast events for task modifications (name/content change, column change, etc.)
• Use the room system to group users by project
• Only allow authenticated users that are in respective projects to send room events