Adding a `<Point />` component

[Jakidxav]

I noticed that there is a <Fill /> and <Line /> component, but not one for points. From looking at other CarbonPlan repositories, it looks like most point layers are being added into the map.style object on map load. Is there any interest in a standalone <Point /> component?

For what this could look like, I have an initial version here. A couple of notes about this component:

• It requires that the main map component has glyphs defined (i.e., <Map ... glyphs={glyphs} />, where for example glyphs = 'http://fonts.openmaptiles.org/{fontstack}/{range}.pbf').
• I have initially combined the ability to add points and text labels into a single component. However, I could separate out the text labels (for example, into a <Labels /> component) if that would be better.

[Shane98c]

This is a cool idea but we're inclined to keep the tool as theme-agnostic as possible (no predefined fonts etc.). You should be able to implement what you've done here in your app by using the useMapbox hook.