[Phase 2] Documentation

[prosdev]

Description

Add complete documentation for modal and inline plugins.

Tasks

• Create docs/pages/reference/plugins/modal.mdx
• Create docs/pages/reference/plugins/inline.mdx
• Update docs/pages/reference/plugins/_meta.json
• Document modal configuration options
• Document inline configuration options
• Add code examples for each
• Document accessibility features (modal)
• Add best practices guides
• Update plugins overview page

Acceptance Criteria

• Complete API reference for modal
• Complete API reference for inline
• Configuration examples with defaults
• Accessibility guidelines for modal
• Best practices for each layout
• Docs build successfully

Estimate: 0.5 days