Add sup pattern file

[miasinterestinglife]

This is a Pattern to mostly parse PGS Subtitles (in .sup format). I don't know what to do about the MIME Type, as PGS subtitles don't have one as far as i know.

[WerWolv]

Hey, Thanks a lot!

Don't worry about the MIME type. If there isn't one, just leave it as it is. The magicpragma will take care of the detection.
If possible, could you upload a test file to /tests/patterns/test_data so we can run the unit tests on your pattern in the future? Also please add the pattern to the table in the readme and if you like add a #pragma author <Your Name>to the pattern so we can give credit to you in the UI :)

[miasinterestinglife]

That shoud be it, right?

[miasinterestinglife]

It would be possible to add decoding of the actual images at a later point, but it would be a huge undertaking. Decoding (and the entire format) is described here: https://blog.thescorpius.com/index.php/2017/07/15/presentation-graphic-stream-sup-files-bluray-subtitle-format/#comment-480 (there is some minor mistakes that were corrected in the comments)

[WerWolv]

Thanks! Looks good yeah :)

Having it decode the images would be really cool but by no means required in the first version. I'm happy to merge any future PRs improving upon it though!