Proposal: Standardize map config files naming

Currently, your kepler.gl examples have data and config files in folders in this repo: https://github.com/uber-web/kepler.gl-data

I propose you standardize map config files naming by using .map.json || .kgl.json convension if your map configs are kepler.gl specific.

Then both data and map configs can be stored alongside for quick raw data and map config views in dev tools and other tools can provide additional views of your map.json configs just based on this simple file naming convention.

This is in addition to the #885 I requested.

Example Usage (shameless plug):

I started working on geo data viewer to create better geo data preview for vscode devs:

https://github.com/RandomFractals/geo-data-viewer

With json schema and standardized map config files naming it would be much easier to differentiate your config files from other .json files.