feat: add widget properties documentation template and Data Grid 2 props

[iobuhov]

Summary

Add a standardized template for documenting widget properties and generate comprehensive documentation for Data Grid 2.

Changes

1. Widget Properties Template (.agents/templates/widget-props.md)

   • 5-column table format: Property, Type, Default, Required, Description
   • Clear placeholders for property groups and nested objects
   • Instructions for documenting enumerations consistently
   • Example section showing proper usage (marked to exclude from final docs)

2. Data Grid 2 Properties Documentation (packages/pluggableWidgets/datagrid-web/props.md)

   • Complete documentation of 60+ properties
   • Organized by Studio Pro property groups (General, Behavior, Personalization, Texts)
   • All enumeration values documented with key, label, and description
   • Nested properties (column configuration) properly structured
   • Type constraints documented for attributes and expressions

Template Features

• Property table: Captures key, type, default value, required status, and description
• Enumeration documentation: Consistent format for enum values with XML key, Studio Pro label, and description
• Nested objects: Clear structure for object lists (e.g., column properties)
• Type constraints: Documents attribute types, return types, and data source references
• Hierarchical sections: Matches Studio Pro property group organization

🤖 Generated with Claude Code