VeriWorkly cover letter templates and rendering support

Added(20)

• Added:
• VeriWorkly Special
• Professional
• Introduced modern two-column layouts
• Improved document presentation and structure
• Added PDF rendering using React PDF
• Added web rendering support with dynamic content handling
• Improved rendering consistency across platforms
• Refactored template metadata handling
• Aligned templates with the new shared TemplateMeta architecture
• Removed legacy metadata interfaces
• Improved cover letter preview generation
• Enhanced HTML rendering support
• Simplified shared rendering workflows
• Improved rendering system organization
• Enhanced consistency across document templates
• Continued stabilization of shared template infrastructure
• Beta quality release
• Additional rendering improvements and template refinements expected
• Focused on cover letter workflows and rendering system consistency