Add extensive bilingual English-Persian Shenava-1 card

Set Shenava artifact license to Apache-2.0

Document int4/int8 quants

Add int8 (matmul-only) quant

Add int4 (MatMulNBits/Q4_0) quant

Upload README.md with huggingface_hub

Upload shenava_tract_streaming.patch with huggingface_hub

Upload persian_itn.py with huggingface_hub

Upload tokens.txt with huggingface_hub

Upload model.onnx with huggingface_hub

initial commit