Add Booking Type Filtering to Zapier trigger

I'm using the TidyCal + Zapier integration to automate follow-up workflows when someone books a specific event. The current "New Booking" trigger fires for all bookings with no way to filter by event type within TidyCal itself.

This forces a multi-step Zap (trigger → filter → action) which requires a Zapier paid plan, even though the underlying need is simple: only trigger when a booking is made for a specific event.

A fix could be either of these:

• Add an optional "Event" field to the New Booking trigger so users can select which event to watch
• Offer separate triggers per event type

This would make the free Zapier tier viable for straightforward single-event automations and would be a meaningful improvement for users running multiple event types.