Enhancement: support heic images

src/paperless_tesseract/parsers.py

@@ -108,6 +108,7 @@ class RasterisedDocumentParser(DocumentParser):
             "image/bmp",
             "image/gif",
             "image/webp",
+            "image/heic",
         ]
 
     def has_alpha(self, image) -> bool:

src/paperless_tesseract/signals.py

@@ -16,5 +16,6 @@ def tesseract_consumer_declaration(sender, **kwargs):
             "image/gif": ".gif",
             "image/bmp": ".bmp",
             "image/webp": ".webp",
+            "image/heic": ".heic",
         },
     }