Port/Implement Initiative tracker

[XenotropicDev]

Use buttons over reactions

[rsek]

long term, it might be cool to integrate this into a task-specific tracker for Starforged combat, featuring initiative details, progress track(s), and a dropdown component that can produce the text of relevant moves when interacted with. i'll put a prototype together on a branch of my fork.

[rsek]

i think this would be well worth revisiting once #76 is available, perhaps integrated directly into the combat progress track post but encapsulated in its own little embed.

a party-agnostic version might be possible (at least for the first 125 or so characters on a server, with dropdowns - or using several optional autocomplete arguments), but seems like more work than necessary when we can piggyback off the party system anyways