Geotiff - Exposing the tags

[skywalkerisnull]

Hello,

We have been extensively using ImageSharp in most of our projects, and are starting to look to how we can also use it to process our GeoSpatial GeoTiffs. We have no issues for opening the image and doing any processing we need to on it. But, preserving the geospatial information, or doing any manipulations is a key requirement. Currently the tiff metadata does not expose any of the geospatial information: https://github.com/SixLabors/ImageSharp/tree/main/src/ImageSharp/Formats/Tiff

The GeoTiff V1.1 standard: https://docs.opengeospatial.org/is/19-008r4/19-008r4.html

We would be needing support for both read and write the meta data for the GeoTiff

I notice this request that is related: #1324