Move configs to separate directory

[oscarlorentzon]

Motivation

Make root directory cleaner.

Contribution

• Move most configs to config dir
• Use module build in examples
• Refactor Rollup scripts to avoid duplication

Test Plan

yarn prepare
yarn test
yarn start

http://localhost:8000/index.html
http://localhost:8000/leaflet.html
http://localhost:8000/marker.html
http://localhost:8000/popup.html
http://localhost:8000/tag.html
http://localhost:8000/spatial.html