[pinterest] Add extractor (closes #25747)

youtube_dl/extractor/extractors.py

@@ -844,6 +844,10 @@ from .picarto import (
 )
 from .piksel import PikselIE
 from .pinkbike import PinkbikeIE
+from .pinterest import (
+    PinterestIE,
+    PinterestCollectionIE,
+)
 from .pladform import PladformIE
 from .platzi import (
     PlatziIE,