[CHART EDITOR] Added tooltip field for data event fields

[amyspark-ng]

Does this PR close any issues? If so, link them below.

fixes #4218

Briefly describe the issue(s) fixed.

This adds tooltips for event data fields, this way the field of any event toolbox will add extra info on how the event uses that field

Mods that use custom events can also make use of this when creating their SongEventSchema, it would look something like this:

class CustomEvent extends SongEvent {
    public function new() {
        super('customEvent');
    }
    
    public override function getEventSchema(): SongEventSchema {
        return [
            {
                name: "quantity",
                title: "Attack Quantity",
                defaultValue: 1,
                type: "integer",
                step: 1,
                tooltip: "The amount of attacks to do"
            }
        ];
    }
}

Include any relevant screenshots or videos.

You can't look at it properly due to #4126 but they seem to work properly

2025-02-23_22-27-30.mp4