Add Beefree SDK section for embeddable email builder

[zairro]

Pull Request Description

Added Beefree SDK Integration

This PR adds information on Beefree SDK, an embeddable no-code, drag-and-drop email builder that enables email creation and editing capabilities.

What's Included

1. Frameworks → React Section:

• Added Beefree SDK as a React component solution for embeddable email building
• Highlights key features: no-code drag-and-drop editor, email building/editing/exporting
• Includes AI capabilities for email creation and editing
• Supports importing existing HTML templates

2. Templates Section:

• Added Beefree SDK as a template solution with a comprehensive Template Catalog
• Includes email QA (quality analysis) checks for optimized rendering
• Accessibility verification and CTA validation capabilities
• Export functionality for finished templates

3. Tools Section:

• Enhanced tools listing with Beefree's email QA capabilities
• Added content verification and optimization features
• Includes rendering optimization

4. Self-Hosted Services Section:

• Added Beefree SDK storage options for self-hosting or hosting reusable content components
• Supports content reuse across multiple email templates

5. Testing Section:

• Enhanced testing tools with Beefree's QA analysis
• Added email quality verification capabilities
• Includes accessibility and rendering testing features

6. Blogs Section:

• Added Beefree SDK developer blog as a resource
• Targeted content for Product Managers and Developers
• Resources for building products supporting Email Marketers, Lifecycle Marketers, and HTML developers

Benefits

• Developer-Friendly: Easy integration into React applications
• Comprehensive: End-to-end email creation and quality assurance
• AI-Powered: Modern AI capabilities for content creation
• Quality Focus: Built-in testing and optimization tools