Enhancement: BPM change event

[amyspark-ng]

Issue Checklist

• I have properly named my enhancement
• I have checked the Issues/Discussions pages to see if my enhancement has already been suggested

What is your suggestion, and why should it be implemented?

Why is there not an event to signify bpm changes, i think they're only on metadata but i don't see anything for monster in the chart editor

[Average-FNF-Modder]

They are currently found manually inside a charts .json (check Monsters .json to see this, it's at the start), though some artwork in the files suggests plans to add an event.
I however have already suggested this in #2911

[Hundrec]

It's quite strange that there is BPM change functionality and an event icon, but still no basic BPM change event with at least one field.