ComicInfo.xml Format section for docs

[ajslater]

Following up on this https://github.com/anansi-project/comicinfo/issues/41#issuecomment-1521118952

A Format section for the ComicInfo docs.

The documentation provided is descriptive, in that It's based on what I've seen in the wild. I have never used ComicRack and don't actually know the original intention for this field.

[majora2007]

Here is a good list of some of them:

    Special
    Reference
    Director's Cut
    Box Set
    Box-Set
    Annual
    Anthology
    Epilogue
    One Shot
    One-Shot
    Prologue
    TPB
    Trade Paper Back
    Omnibus
    Compendium
    Absolute
    Graphic Novel
    GN
    FCBD

[gotson]

Thanks @ajslater