[wenet] support context biasing in bin/recognize.py

[cdliang11]

热词列表：

荣誉伟
北京
人名大会堂

# 不使用热词
python wenet/bin/recognize.py --modes "attention_rescoring" --config 20220506_u2pp_conformer_exp/train.yaml --data_type "raw" --test_data data.list --checkpoint 20220506_u2pp_conformer_exp/final.pt  --dict 20220506_u2pp_conformer_exp/units.txt --result_dir result
2023-11-12 22:28:37,392 INFO attention_rescoring 1000003_0f90da0d.wav 日本内阁官房长官荣誉为表示
# 使用热词
python wenet/bin/recognize.py --modes "attention_rescoring" --config 20220506_u2pp_conformer_exp/train.yaml --data_type "raw" --test_data data.list --checkpoint 20220506_u2pp_conformer_exp/final.pt  --dict 20220506_u2pp_conformer_exp/units.txt --result_dir result --context_graph_score 6.0 --context_list_path hotword.txt --context_bias_mode decoding-graph
2023-11-12 22:29:16,374 INFO attention_rescoring 1000003_0f90da0d.wav 日本内阁官房长官荣誉伟表示