Add command to setup index

[mruwnik]

from align_data.pinecone.pinecone_db_handler import PineconeDB
pinecone_db = PineconeDB(create_index=True)

would create the pinecone db for the user if they set up all the env and settings variables correctly. Might be worth mentioning. Also, it might be worth adding as a method in main.py, for the user to run if they don't have a pinecone db set up yet that runs the above code. Asking the user to create the Pinecone index by themselves would be more error prone, for instance it should be clear that the index should be created with metadata_config={"indexed": [our metadata keys]} as well as the name/dim/metric.