[CAL-3573] analytics apps: add "Confirm" as a trigger event

[PeerRich]

for all analytics apps that have event tracking, we should track this button:

_{From SyncLinear.com | CAL-3573}

[PeerRich]

even if no analytics app is installed we should track this button and show it insight https://app.cal.com/insights

[princyym]

hey, Could you elaborate more related to this?

[sean-brydon]

Will add this with help of the getLancey addition of posthog in

feat: adding posthog libs for node + js by abhi-slash-git · Pull Request #16862 · calcom/cal.com