feat: update package version to 4.0.2 and add version badge to demo page

[devin-ai-integration]

Update Package Version and Add Version Badge to Demo Page

Changes Made

• Updated package.json version from "4.0.1" to "4.0.2"
• Added version badge display in demo page jumbotron section using Bootstrap styling
• Implemented JavaScript to dynamically load version from package.json with fallback
• Updated package-lock.json to reflect version change

Implementation Details

• Version badge uses label label-info Bootstrap class for consistent styling
• JavaScript uses $.getJSON() to fetch version from ../package.json
• Includes fallback to hardcoded version if JSON loading fails
• Badge displays as "v4.0.2" format for clear version identification

Testing Verification

✅ Local Testing Completed

• Started development server with npm run serve
• Verified demo page loads correctly at http://localhost:3000/demo/index.html
• Confirmed version badge displays "v4.0.2" correctly in jumbotron section
• Version badge styling matches existing Bootstrap theme

Technical Notes

• Environment issues encountered with ESLint v9 configuration (reported separately)
• Build process completed successfully with expected Sass deprecation warnings
• All functionality tested and working as expected

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Link to Devin run: https://app.devin.ai/sessions/64ec57bbd6ce4bce91d52ec8dccb9c23

Requested by: ateliee (ateliee@gmail.com)

[devin-ai-integration]

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