Improve model card: full HF release documentation

Add model card README

Initial HF release: added_tokens.json

Initial HF release: special_tokens_map.json

Initial HF release: tokenizer_config.json

Initial HF release: tokenizer.model

Initial HF release: tokenizer.json

Initial HF release: generation_config.json

Initial HF release: config.json

Initial HF release: model.safetensors

initial commit