docs(notebooks): add introduction to primitives tutorial

[ritajitmajumdar1]

Summary

add introduction to primitives tutorial

Details and comments

Quite a few of my friends send me queries regarding Qiskit. The common thing which I gather from their queries is the inability to utilise the capabilities of primitives effectively. Therefore I created this notebook to walk them through the steps

• using SamplerV2 for obtaining probability distribution,

• manually finding expectation values with SamplerV2, and its disadvantages,

• calculating multiple expectation values for one circuit using EstimatorV2,

• calculating the expectation value of a linear combination of observables using EstimatorV2,

• making isa compatible circuits and observables for running on real/fake backends

These information are all available in Qiskit documentation. I summarised them for the ease of understanding of beginners. Putting this notebook here in case this is useful for anyone (or any workshop).

[coveralls]

Pull Request Test Coverage Report for Build 8917363438

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 100.0%

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Totals
Change from base Build 8906390959:	0.0%
Covered Lines:	290
Relevant Lines:	290

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💛 - Coveralls

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