Fix: docs site component overview page layout and cards style

[satyamyadav]

What does this implement/fix? Explain your changes.

• Fix docs site component overview page content container width and cards width, height and opacity
• Update default storybook url in docs exporter script
• Structure package json and add engine restriction for node 20.x

Does this close any currently open issues?

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Any other comments?

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Dependent PRs/Commits

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Describe breaking changes, if any.

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Checklist

Check all those that are applicable and complete.

• [ ] Merged with latest master branch

[anuradha9712]

@satyamyadav Reverting this PR as it requires some more changes:

• opacity token (--opacity-20) is not defined in the current DS version used in docs site. Please update the design-system version.
• Giving height of 184px to .overview-container-card class leads to overlapping of image and text.
• Need to discuss why we are switching from 4x4 grid to 2x2. Using 2x2 grid shows a lot of empty space on the page.