Add simple text vector search IMDB no-schema Milvus Client

[christy]

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• A description of the changes proposed in the pull request.

  This notebook adds a simple text semantic vector search example using IMDB data and no-schema Milvus Client.

  • Utility functions for splitting and search in imdb_utilities.py
  • Add an example .env file; users will need to replace values with their own tokens.
  • Add explanation AUTOINDEX is the default construction + search index; but show how to override.
  • Display question + answers together.

• Add delight to the experience when all tasks are complete 🎉

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[christy]

• Add a .env example.
• AUTOINDEX is the default and it is compatible with both milvus and zilliz.
• Have the question and answers displayed together.