[Client] adding nodejs cac and experimentation client wrapper

[namitgoel]

Problem

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Solution

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Environment variable changes

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Pre-deployment activity

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Post-deployment activity

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API changes

Endpoint	Method	Request body	Response Body
API	GET/POST, etc	request	response

Possible Issues in the future

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[Datron]

@namitgoel Can you add a README file that documents how to add the nodeJS clients to a project, and also how to build and run them?

[ayushjain17]

Also, make sure to deallocate the data allocated via after it has been used