fix(storybook): turn sidenav js examples to tsx

[saurabhdaware]

Description

We were explicitly defining .js extension in some examples. Turned them into .tsx so that vite doesn't fail and resolving JSX syntax

Changes

Additional Information

Component Checklist

• Update Component Status Page
• Perform Manual Testing in Other Browsers
• Add KitchenSink Story
• Add Interaction Tests (if applicable)
• Add changeset

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Latest commit: 05ce3d3

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