[Phase 2] Inline Plugin

[prosdev]

Description

Implement inline plugin for embedding experiences directly within page content using DOM selectors.

Tasks

• Create packages/plugins/src/inline/ directory structure
• Define TypeScript types (types.ts)
• Implement core inline plugin (inline.ts)
  • DOM selector resolution
  • Content insertion
  • Dismissal with localStorage persistence
  • Event emission
• Add default CSS styles
• Export from packages/plugins/src/index.ts
• Auto-register in packages/core/src/runtime.ts

Acceptance Criteria

• Inline content renders in specified selector
• Dismissable with persistence
• Gracefully handles missing selectors
• Mobile responsive
• Emits standard events (shown, action, dismissed)
• Multiple inline experiences supported
• Custom styles and className work

Estimate: 1 day