[EPIC] Document the case for geoparquet

[emmalu]

Context

Geoparquet is a relatively new but powerful OGC standard for distributing and visualizing vector data at scale. We should advocate a strong case for why and how all users can leverage this data format.

Issue

Compile notes about the value of Geoparquet in the world of Cloud-Native map visualizations and add documentation that guides users through the process of transforming their data into Geoparquet.

Acceptance-Criteria

These are the tasks that need to be completed or artifacts that need to be produced.

• Finish GeoArrowPolygonLayer implementation to reduce the work necessary to load a geoparquet dataset via DeckGL: Implement GeoArrowPolygonLayer #61
• Isolate the instructions from this observable notebook by @kylebarron on how to create the most efficient Geoparquet files for use with deck.gl-layers and lonboard
• Document several examples of various datasets (points, lines, polygons) in various formats (geojson, geopackage, shapefile, geoparquet, flatgeobuf) to make a strong case for using Geoparquet, perhaps something similar to this notebook, which was forked from this other notebook by @kylebarron