Template experience and workspace navigation enhancements

Added(15)

• Added comprehensive template presentation components
• Improved template discovery and exploration
• Enhanced template information and guidance
• Added ProfileControl and WorkspaceNavigation
• Added theme switching functionality
• Improved workspace usability and consistency
• Added template detail schemas and shared metadata structures
• Improved maintainability and scalability of template content
• Enhanced document type descriptions
• Improved template navigation flows
• Refined platform content organization
• Simplified API key authentication middleware
• Improved maintainability of template-related systems
• No breaking changes
• Focused on template presentation, navigation, and platform usability