[thefap] add support (#8821 #8822)

* adding site support for thefap.com
* fixing typo in url tld
* improve & simplify 'model' extractor
* update 'post' extractor
* update docs/supportedsites
* add tests

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Co-authored-by: Mike Fährmann <mike_faehrmann@web.de>

scripts/supportedsites.py

@@ -193,6 +193,7 @@ CATEGORY_MAP = {
     "thebarchive"    : "The /b/ Archive",
     "thecollection"  : "The /co/llection",
     "thecollectionS" : "The /co/llection",
+    "thefap"         : "TheFap",
     "thehentaiworld" : "The Hentai World",
     "tiktok"         : "TikTok",
     "tmohentai"      : "TMOHentai",