Add custom processor

Add a custom processor to parse HTML.

tokenizer_config.json

@@ -68,12 +68,14 @@
   "errors": "replace",
   "mask_token": "<mask>",
   "max_depth": 50,
+  "max_length": 512,
   "max_width": 1000,
   "model_max_length": 512,
   "only_label_first_subword": true,
   "pad_token": "<pad>",
   "pad_token_label": -100,
   "pad_width": 1001,
+  "padding": "max_length",
   "processor_class": "MarkupLMPhishProcessor",
   "sep_token": "</s>",
   "tags_dict": {
@@ -295,5 +297,6 @@
   },
   "tokenizer_class": "MarkupLMTokenizer",
   "trim_offsets": false,
+  "truncation": true,
   "unk_token": "<unk>"
 }