[pornpics] add 'category' and 'listing' extractors (#8662)

* [pornpics] add category and listing extractors

Add support for:
- Category pages like /ass/, /milf/, /blonde/ etc.
- Listing pages like /popular/, /recent/, /rating/, /likes/, /views/, /comments/

Category pages use JSON pagination like tags/search.
Listing pages don't support JSON pagination and use different HTML structure.

* [pornpics] simplify category pattern via class ordering

- Move PornpicsCategoryExtractor after PornpicsListingExtractor
  so it acts as catch-all, eliminating need for negative lookahead
- Use list comprehension in PornpicsListingExtractor.galleries()

* update docs/supportedsites

gallery_dl/extractor/pornpics.py

@@ -116,3 +116,35 @@ class PornpicsSearchExtractor(PornpicsExtractor):
             "offset": 0,
         }
         return self._pagination(url, params)
+
+
+class PornpicsListingExtractor(PornpicsExtractor):
+    """Extractor for galleries from pornpics listing pages
+
+    These pages (popular, recent, etc.) don't support JSON pagination
+    and use single quotes in HTML, unlike category pages.
+    """
+    subcategory = "listing"
+    pattern = (rf"{BASE_PATTERN}"
+               rf"/(popular|recent|rating|likes|views|comments)/?$")
+    example = "https://www.pornpics.com/popular/"
+
+    def galleries(self):
+        url = f"{self.root}/{self.groups[0]}/"
+        page = self.request(url).text
+        return [
+            {"g_url": href}
+            for href in text.extract_iter(
+                page, "class='rel-link' href='", "'")
+        ]
+
+
+class PornpicsCategoryExtractor(PornpicsExtractor):
+    """Extractor for galleries from pornpics categories"""
+    subcategory = "category"
+    pattern = rf"{BASE_PATTERN}/([^/?#]+)/?$"
+    example = "https://www.pornpics.com/ass/"
+
+    def galleries(self):
+        url = f"{self.root}/{self.groups[0]}/"
+        return self._pagination(url)