Use NVIDIA endpoints in example notebooks and demonstrate using milvus as a vector database

[ChrisJar]

Description

Checklist

• I am familiar with the Contributing Guidelines.
• New or existing tests cover these changes.
• The documentation is up to date with these changes.

TODO:

• Demonstrate add example vdbupload and store tasks (still working out how to hook this into llamaindex and langchain)
• Demonstrate storing with minio and fetching and displaying some of the images

closes #122
closes #124

[randerzander]

Suggested change

	"Then, we'll create a retriever from our vector score that will allow us to retrieve our documents by semantic similarity and we'll use an llm from NVIDIA's API catalog to generate the final answer from the retrieved documents"
	"Then, we'll create a retriever from our vector store that will allow us to retrieve our documents by semantic similarity and we'll use [llama-3.1-405b-instruct](https://build.nvidia.com/meta/llama-3_1-405b-instruct) to generate the final answer from the retrieved documents"

[randerzander]

Left several review comments to be addressed