Add trigger functionality to Focused Ballista Support

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Is your feature request related to a problem?

It would be nice if Focused Ballista Support could "trigger" supported ballista totem skills, limiting their attack rate the same way that Asenath's Chant or similar effects limit the trigger rate of spells based on the attack speed of the triggering skill.

Describe the solution you'd like

Adding Focused Ballista Support to a skill group should cause ballista totem skills in that group to have their attack rate limited to the attack rate of a "triggering skill" that is used by the player, subject to the same effects as all other triggers in PoB (missed trigger intervals reducing the trigger rate, warning when no trigger is found, etc.). This would of course use the totem's attack speed as the limit to the trigger rate, as opposed to other triggers that use an internal cooldown.

Describe alternatives you've considered

Currently, to calculate true DPS from ballista skills supported by Focused Ballista, you have to do all of the trigger rate calculations and comparisons by hand.

Additional context

No response

Inizia individuando la gestione di Focused Ballista Support e i calcoli dei trigger esistenti nella codebase Lua. Confronta il modo in cui gli attuali trigger gestiscono i limiti della velocità d’attacco, gli intervalli mancati e le skill di attivazione mancanti. Il lavoro è completato quando i totem ballista supportati usano la velocità della skill di attivazione ed espongono gli stessi avvisi e calcoli della velocità senza confronto manuale.