Template filtering and document type architecture improvements

Added(15)

• Added dynamic family and layout filter generation
• Improved filtering flexibility across template categories
• Enhanced scalability for future template additions
• Improved template group and header information rendering
• Added document type summaries and layout statistics
• Enhanced template browsing and discovery workflows
• Fixed template link generation and document type routing
• Improved template metadata structure and type safety
• Enhanced shared template utility consistency
• Improved Templates Portal layout and information structure
• Enhanced visual organization and navigation clarity
• Refined shared template configuration handling
• Improved maintainability and extensibility across template systems
• No breaking changes
• Focused on template scalability, filtering consistency, and document type improvements