✨ Add AI cover image generation feature

Implement a new feature to generate cover images for blog posts using Google's Gemini API. Includes updates to the blog posts controller, form view, and a new service for handling image generation. :lipstick: Add user email display in event details Show the user's email below their name if it is present, enhancing the information available in the event details. :lipstick: Update post layout and improve styling Refine breadcrumb navigation and enhance cover image presentation for better visual appeal.