I hope to optimize the time interval of the TimelinePlugin.

[lyc-1999]

existing code:
`
const timeInterval = this.options.timeInterval ?? this.defaultTimeInterval(pxPerSec)

private defaultTimeInterval(pxPerSec: number): number {
if (pxPerSec >= 25) {
return 1
} else if (pxPerSec * 5 >= 25) {
return 5
} else if (pxPerSec * 15 >= 25) {
return 15
}
return Math.ceil(0.5 / pxPerSec) * 60
}
`
However, the timeInterval may be customized through the formatTimeCallback method, for example: MM:SS or HH:MM:SS. Therefore, it is unreasonable for the defaultTimeInterval method in the code to determine the time interval based on a fixed number and length.