Add Language Model Decoder

Closes #142 (closed)

Taking over from !222 (closed)

dan/ocr/predict/__init__.py

@@ -167,4 +167,10 @@ def add_predict_parser(subcommands) -> None:
         type=str,
         required=False,
     )
+    parser.add_argument(
+        "--use-language-model",
+        help="Whether to use an explicit language model to rescore text hypothesis.",
+        action="store_true",
+        required=False,
+    )
     parser.set_defaults(func=run)