feat: Support Mobs / Ensembles

[dschinkel]

Ability to form mobs or multi-mobs.

Scenarios:

1) A team pairs but also sometimes mobs together, so you end up with a mix. You might have more of a mix: some pairs and maybe a mob or two on a given team
2) A team always mobs or splits into multi-mobs

Example: Right now I work on a team where half the time we are working in 3s not just 2s. The ability to drag someone over and make a current pair a mob would be super useful for the history and visibility and would more realistically match how we work on this given team

I imagine that if we had such a thing, it would rewrite history (it'd create a new entry in the History for the creation of a mob after a spin has already been saved). That way we could record newly formed mobs and have it somehow be accounted for in the pair algorithm / heat map?

Adding this feature would require (so separate stories for these):

• Ability to drag/persist more than 2 people into a pairing group/assignment
• Spin is able to take into account groups that have more than 2 people to determine rotations
• History is able to account for groups that have more than 2 people
• Heat map is also able to take into account stats based on your time mobbing with certain people
• UI would need to flex as group participants increase (resize them appropriately) to show more than 2 people. You could add a third card say on top of a pair, but what if you have more than 3 in a mob? resizing groups would need to happen so that you can view the pairing group/assignment better
• Put a limit on how many can be in a group? Maybe limit to 6?