Add bookmarklet support for Pillowfort

[HeeroWingZero]

Example artist: https://www.pillowfort.social/MILKER

Example post: https://www.pillowfort.social/posts/1810960

Example direct: https://img3.pillowfort.social/posts/4fd1d1dcfbfa_Shoes.png

Example sample: https://img3.pillowfort.social/posts/4fd1d1dcfbfa_Shoes_small.png