Additional control over timelinePoint

[AlexHZhou]

Is your feature request related to a problem? Please describe.
I would like more customization options for timelinePoint.

Describe the solution you'd like
I would like

(1) option to set the background color of the timelinePoint

I currently use this theme:

theme={{
          primary: 'black',
          secondary: '#FEEBC8',
          cardBgColor: '#FEEBC8',
          titleColor: 'black',
          titleColorActive: 'black',
        }}

Perhaps connect the timelinePoint's color to one of these (imo it should be primary, since that is the color of the timeline line) or provide another field to directly change the color.

(2) the option to have no timelinePointShape (since I am providing my own icons, I do not need a shape at all)
This is not the same as disableTimelinePoint, because if that is set to true, all icons are ignored entirely, which is not what I want

Describe alternatives you've considered
For (1) It doesn't seem possible to change the color, so I don't think there are any alternatives.
For (2), The closest is just disableTimelinePoint, but that is not what I want.

Additional context
Add any other context or screenshots about the feature request here.