Support data placeholder syntax

[akonan]

Description

Add syntax for generating placeholder/dummy data in wireframes.

Proposed Syntax

{{user.name}}          <!-- John Doe -->
{{user.email}}         <!-- john@example.com -->
{{lorem:2}}            <!-- 2 paragraphs of lorem ipsum -->
{{image:400x300}}      <!-- Placeholder image -->
{{date}}               <!-- 2025-01-15 -->
{{number:1000-9999}}   <!-- Random number -->

Use Cases

• Realistic wireframe previews
• Testing with sample data
• Documentation examples
• Design presentations

Implementation

• Use faker.js or similar
• Configurable data generation
• Repeatable/seeded data option

Priority

Low

Labels

enhancement, placeholders, data