Add support for countdown of world buffs that are about to pop

[a17n]

Describe the problem

Currently BigWigs does not support countdown of world buffs (Onyxia/Nefarian, Hakkar, Rend) that are about to pop. Since the meta in Classic is to bring those to raids and the process to get them is really painful it helps a lot if you can time those on your current character or log other characters when those are about to pop.

DBM currently supports this.

What steps will reproduce the problem?

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What version of BigWigs are you using? (Stating 'latest' is not useful)

Do you have an error log of what happened?

Any additional information? (example: WoW language if not English)

[nebularg]

Why not just use something specialized for this like https://www.curseforge.com/wow/addons/nova-world-buffs ? Persistent cooldown tracking isn't really something BigWigs handles.

[a17n]

@nebularg Nova tracks the CDs of world buffs, that is a different use case. What I am requesting is the notification and timer between the quest is turned in/the NPC yells and when the actual buff is applied to players. For example Onyxia/Nef pops 15 seconds after the quest is turned in. This is enough time for you to login your raidlogged player and receive the buff.

[nebularg]

Ah, it doesn't do zone yell callouts? That's a bit more narrow in scope and seems doable

[a17n]

@nebularg exactly. So 1) Announce the yell so you know it was handed in and will pop soon, 2) Add a countdown timer from that yell to when the actual buff is handed out.