test: add testcases for Setup Guide

[arjav1528]

Description

Overview

Improved test coverage for the SetupGuide components in src/components/HomeComponents/SetupGuide/. Focused on adding meaningful tests rather than coverage-only tests, with no functional changes to the codebase.

Changes Summary

📁 Files Modified

1. __tests__/utils.test.ts - Added comprehensive tests for exportConfigSetup utility function
2. __tests__/CopyableCode.test.tsx - Enhanced tests for CopyableCode component with sensitive value functionality
3. SetupGuide.test.tsx - Expanded tests for SetupGuide component including download functionality

• Fixes: Add frontend test suites/cases for src/components/HomeComponents/SetupGuide #301

Checklist

• Ran npx prettier --write . (for formatting)
• Ran gofmt -w . (for Go backend)
• Ran npm test (for JS/TS testing)
• Added unit tests, if applicable
• Verified all tests pass
• Updated documentation, if needed

Additional Notes

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[its-me-abhishek]

please fix prettier issues