feat: Invitation system with CRUD Relations and comprehensive documentation

[tnramalho]

Summary

Adds a complete invitation system with email notifications, OTP validation, and comprehensive CRUD Relations documentation with patterns for both ConfigurableCrudBuilder and Direct @CrudController approaches.

Features Added

• Invitation System: Complete workflow with email notifications and OTP validation
  • Create, accept, reattempt, and revoke invitation endpoints
  • Event-driven architecture with customizable listeners
  • Email templates for invitation and acceptance notifications
• CRUD Relations Documentation: Comprehensive guide with both implementation patterns
  • ConfigurableCrudBuilder pattern for complex scenarios
  • Direct @CrudController pattern for standard operations
  • Adapter-agnostic support (TypeORM, JSON, Supabase, etc.)

Documentation Improvements

• Enhanced integration guide with invitation event listeners and best practices
• Consolidated duplicate content in CRUD patterns guide for better readability
• Added troubleshooting checklists and success criteria
• Included copy-paste templates and common mistakes sections
• Added adapter-agnostic clarifications for broader compatibility

Test plan

• Test invitation creation via admin endpoints
• Verify email sending and OTP validation
• Test invitation acceptance with custom payload
• Validate CRUD Relations work with both patterns
• Confirm documentation examples are accurate

[docs-page]

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docs.page/btwld/rockets~17

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