Allow to set a custom layer ID, and layer properties about react-three-map

[iduuck]

Just tried to implement this myself. Didn't test it though, #70.

[RodrigoHamuy]

Makes sense. If this was a normal react-map-gl, what would the properties that you want to set? Can you maybe drop an example like:

<Layer id={id} // what else? />

[iduuck]

The example would look like this:

<Layer 
  id="my-custom-id" 
  {...otherProps}
  beforeId="another-layer-id" 
/>

My ideal implementation would be:

<Canvas 
  id="my-custom-id" 
  beforeId="another-layer-id" 
>
  {/* Models/Coordinates here */}
</Canvas>

I see, that we are setting an ID based on the useId given to us by React. But this is not the ideal approach in this case, because it's an actual identifier rather than a key identifying the react element.

[RodrigoHamuy]

Thanks @iduuck! I merged your PR with a few minor changes and should already be available on latest release.
#76