Reimplement WKT and GeoJSON reader/writer to support Z

[bjornharrtell]

The existing implementation is adapted from OpenLayers 2 and only supports 2D.

Current OpenLayers has better written and more full featured parsers:

• https://github.com/openlayers/openlayers/blob/main/src/ol/format/WKT.js
• https://github.com/openlayers/openlayers/blob/main/src/ol/format/GeoJSON.js

I've investigated transpiling parsers from JTS but it seems more difficult as they depend on enums and built in Java classes that is not needed elsewhere in JTS. I also think transpiled code will be less efficient than adapted code from OpenLayers.