refactor:diff strings for CLI preview

[shivamsouravjha]

Related Issue

• Changed the CLI diff viewer for a better user experience.
• added own date formatter to check for valid dates instead of using external package
• moved from gojsondiff packages as it was flaky and unreliable moved on to more stable GJSON
• created diffIndexRange an offset based on range to colorise difference unlike colouring the entire texts previously.
• Handles array, map of objects, strings.

Closes: #1738

Describe the changes you've made

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Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Code style update (formatting, local variables)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Please let us know if any test cases are added

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Describe if there is any unusual behaviour of your code(Write NA if there isn't)

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Checklist:

• My code follows the style guidelines of this project.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation.
• My changes generate no new warnings.
• I have added tests that prove my fix is effective or that my feature works.
• New and existing unit tests pass locally with my changes.

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[shivamsouravjha]

previous fork of this PR exists as #1766.