Remove redundant direct dependency 'jest-each'

[trivikr]

Description:
Removes redundant test dependency 'jest-each'

Related issue:
N/A

Check list:

• Mark if documentation changes are required.
• Mark if tests were added or updated to cover the changes.

[Copilot]

Pull Request Overview

Removes the redundant jest-each dependency and updates test code to use Jest's built-in it.each method instead of the separate jest-each package.

• Removes jest-each from package dependencies
• Updates parameterized test syntax to use Jest's native it.each method

Reviewed Changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated no comments.

File	Description
package.json	Removes jest-each dependency from devDependencies
tests/main.test.ts	Replaces jest-each import and usage with built-in it.each

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