Add Entelligence Script back again

[fernando-plank]

📥 Pull Request

📘 Description

Entelligence Chat Widget Initialization Improvements

Changes

• Moved script loading to document head instead of body for better performance
• Added defer attribute to main script to ensure proper loading order
• Implemented shadow DOM styles injection with fallback to document head
• Added interval-based retry mechanism for shadow DOM initialization
• Improved script loading sequence with proper event handling

Technical Details

• The widget now loads its styles both in shadow DOM and as fallback in document head
• CSS is fetched from S3 and injected dynamically
• Widget initialization waits for DOM content to be loaded
• Prevents duplicate script injection by checking for existing script tag

🧪 Testing

Please verify:

• Widget loads correctly on page load
• Styles are properly applied in both shadow DOM and fallback scenarios
• The style is breaking the page