Create Maine_2022.geojson

[ankoure]

Added sources for 2022 flyovers from state of maine geolibrary.

All sources can be found here: https://www.maine.gov/geolib/catalog.html

[cicku]

I've been tracking Maine resources for a long time, I'm not able to get a reliable source for the license, please clarify first.

[ankoure]

[ankoure]

Just heard back from the Maine Geolibrary that all of the 2022 Municipal Aerial Imagery datasets are in the Public Domain.

[cicku]

Please correct all issues and make sure the file fulfills the requirements of this project. If there is a layer covering the entire state then please do not submit county wide layers.

We do not support all GeoJSON features and please ensure the file is human readable. You also do not need to optimize for the file size.

[andrewharvey]

@ankoure you can see https://github.com/osmlab/editor-layer-index/blob/gh-pages/CONTRIBUTING.md for some guidance on how the files should be formatted, or take a look at some of the existing sources.