Feature: Editor Plugins — menus, panels, custom property drawers

Current State

The editor has no plugin/extension system. Users cannot extend the editor with custom menus, panels, or property drawers.

Tasks:

• Design the editor plugin system (lifecycle, registration, API surface)
• Implement menu extension API (add items to existing menus, create new menus)
• Implement panel/dockable window registration API
• Implement custom property drawer API for Inspector customization
• Create plugin discovery and loading mechanism from project folder
• Add plugin enable/disable toggle in editor settings
• Document plugin development with examples

Acceptance Criteria:

• Plugins can register custom menus with callbacks
• Plugins can create dockable panels with custom UI
• Plugins can override/render custom property drawers in the Inspector
• Plugins are discovered automatically from a designated project folder
• Plugins can be enabled/disabled without restart
• Clear documentation and at least one example plugin

Related: