Adds notebook for Cost efficient NLP

[FareedKhan-dev]

Summary

This PR introduces a cookbook that provides guidance on performing fundamental NLP tasks in a cost-efficient manner.

Motivation

Over the past few years, developers have encountered significant challenges when dealing with text data, despite the availability of rich resources such as SpaCy and other NLP libraries. These challenges persist due to the constantly increasing volume of data, which demands considerable human involvement, thought, and effort.

Large language models (LLMs), are changing the way we handle text data. LLMs can analyze text data much faster than humans and can understand it in a way that's similar to how we do. So why not leverage their advantages for NLP tasks?

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