Raspawar/add vlm support (#16751)

docs/docs/examples/multi_modal/nvidia_multi_modal.ipynb

...modal_llms/llama-index-multi-modal-llms-nvidia/.gitignore

...ulti_modal_llms/llama-index-multi-modal-llms-nvidia/BUILD

...i_modal_llms/llama-index-multi-modal-llms-nvidia/Makefile

..._modal_llms/llama-index-multi-modal-llms-nvidia/README.md

...dal-llms-nvidia/llama_index/multi_modal_llms/nvidia/BUILD

...ms-nvidia/llama_index/multi_modal_llms/nvidia/__init__.py

...l-llms-nvidia/llama_index/multi_modal_llms/nvidia/base.py

...-llms-nvidia/llama_index/multi_modal_llms/nvidia/utils.py

...l_llms/llama-index-multi-modal-llms-nvidia/pyproject.toml

...odal_llms/llama-index-multi-modal-llms-nvidia/tests/BUILD

...lms/llama-index-multi-modal-llms-nvidia/tests/__init__.py

...lms/llama-index-multi-modal-llms-nvidia/tests/conftest.py

...llama-index-multi-modal-llms-nvidia/tests/test_api_key.py

...ex-multi-modal-llms-nvidia/tests/test_available_models.py

...-multi-modal-llms-nvidia/tests/test_multi_modal_nvidia.py

...s/llama-index-multi-modal-llms-nvidia/tests/test_utils.py