feat : Adds pagination to the products api endpoint

[Kushdapush]

Overview

1. This PR fixes or fixes part of feat : adds sorting and filtering features to the products fetching API #224
2. This PR does the following: adds pagination to the products api endpoint

Essential Checklist

• The PR title starts with "Fix #bugnum: ", followed by a short, clear summary of the changes. (If this PR fixes part of an issue, prefix the title with "Fix part of #bugnum: ...".)
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Proof that changes are correct

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