v0.4.0 – Language Plugin Architecture

🆕 Added

• Introduced extensible Language Plugin architecture.
• Added language registry for scalable language integrations.
• Centralized shared diagnostics state across languages.
• Public Themes export for easier theme access.

✨ Improved

• Refactored extension building to remove switch-based logic.
• Reorganized TypeScript type definitions into modular files.
• Moved language plugins into dedicated plugins directory.
• Simplified diagnostics pipeline with shared infrastructure.
• Improved project structure and maintainability.

🛠 Fixed

• Fixed Themes export location and API.
• Removed JSON-specific validation state duplication.
• Updated editor controller to use shared diagnostics APIs.

🧹 Chore

• Removed unused Vite assets.
• Added Node.js global types to TypeScript configuration.