Buff/Debuff Summary Statistics

[Tsym-or-Tysm]

Could be useful views to both show the user that things are working as expected across all rotations, as well as allow for deep dives of issues where things aren't applying as you would expect.

Current proposal is two views:

1. One high level summary view that shows overall buff uptimes/downtimes by character. Could be done by tracking buff durations by throwing events when a buff starts and expires.
2. A detailed level view that shows, for each damage instance, the % of instances that is getting each buff. Useful for tracking things like VV and is probably the more directly interesting information since buff uptimes can be deceiving due to snapshot timings, etc. Visually showing the information is likely to be tricky, but that's a UI problem rather than a stat problem. This should be somewhat easy to implement since we have logs tied to each damage instance already with this information.

For both proposals above need to measure performance impact...

See this discussion with Dooners regarding Raiden Hyper https://discord.com/channels/845087716541595668/884485336657444894/934652714091171860

Also possibly related to #83