Add pipeline tag and library name to metadata
This PR improves the model card by adding the pipeline_tag: image-text-to-text and library_name: transformers to the metadata.
The pipeline_tag enhances discoverability on the Hugging Face Hub, allowing users to easily find vision-language models for visual reasoning. The library_name enables the automated "How to use" widget on the Hub, providing a ready-to-run code snippet for model interaction using the transformers library. This is supported by the qwen2_vl model type found in the config.json and the presence of Qwen2VLProcessor and Qwen2Tokenizer classes in the tokenizer configuration.
No other changes are proposed to the content, including the title, existing paper link, or sample usage, to align with the majority vote among internal reviews and adhere to specific documentation guidelines.