Updated the sidebar component to allow only one section to expand at a time

[PrityanshuSingh]

What has changed?

Fixed an issue in the Keploy Docs sidebar where clicking on any tab in the navbar resulted in all sidebar tabs expanding simultaneously. The sidebar now maintains a cleaner UX by allowing only one tab to be open at a time.

This PR resolves #2785
keploy/keploy#2785

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update (if none of the other choices apply)

How Has This Been Tested?

• Ran npm run build to ensure build passes without errors.
• Ran npm run serve to manually test sidebar interaction behavior.
• Sidebar now collapses previously open tabs when a new one is expanded.

Screenshots:

Before	After

Checklist:

• My code follows the style guidelines of this project.
• I have performed a self-review of my own code.
• UI is responsive and maintains usability across devices.
• I have tested the changes thoroughly using the development build.

[Copilot]

Pull Request Overview

This PR fixes the issue where all sidebar tabs were expanding simultaneously by ensuring only one section remains expanded at a time.

• Updated the sidebar configuration to set sections as collapsed by default
• Added a new "collapsible": true property for each sidebar category to support the intended behavior

[github-actions]

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