Display variable descriptions in interactive mode prompts #116

Feature Request: Display Variable Descriptions in Interactive Mode

Current Behavior

When running struct generate in interactive mode, users are prompted for missing variables with only the variable name and default value:

❓ Enter value for my_variable [default_value]: 

Desired Behavior

When a variable has a description field in the YAML configuration, it should be displayed in the interactive prompt to help users understand what the variable is for:

❓ Enter value for my_variable [default_value]: 
   Description: The name of your project

Example Configuration

variables:
  - project_name:
      type: string
      description: "The name of your project"
      default: "MyProject"
  - environment:
      type: string
      description: "Target deployment environment"
      enum: ["dev", "staging", "prod"]
      default: "dev"

Expected Output

❓ Enter value for project_name [MyProject]: 
   Description: The name of your project
❓ Enter value for environment [dev] (1) dev, (2) staging, (3) prod: 
   Description: Target deployment environment

Implementation Notes

• The change should be in struct_module/template_renderer.py in the prompt_for_missing_vars method
• Should support both description and help fields (for backward compatibility)
• Should only display the description if it exists in the variable configuration
• Should maintain current functionality for variables without descriptions
• Should work for both regular variables and enum variables

Benefits

• Improved user experience in interactive mode
• Better understanding of what each variable represents
• More self-documenting configurations
• Reduces need to check YAML file while running interactive generation