Add CF projection conversion

[karimbahgat]

One more projection format we could support is the CF metadata standard, which appears to be used by NetCDF files and possibly elsewhere. Links below could be a good starting point, and actually provides some of the equivalent parameter names:

• https://cfconventions.org/wkt-proj-4.html
• http://cfconventions.org/cf-conventions/cf-conventions.html#grid-mappings-and-projections