Add Paragraph Delimited Mappings Extended

[Asbestosstar]

I have added the format Paragraph Delimited Mappings Extended https://pagure.io/FeatureCreep/MappingExFormat with the exception of the Include(inheritance structure) and AccessFlag parts which do not have equivalents in other mapping formats.

[XiaoPangxie732]

The processor and the generator part are big, so I will review them on the weekend

[XiaoPangxie732]

by the way, I'm curious about how you type ¶

[XiaoPangxie732]

wait what

[XiaoPangxie732]

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