chore: commit untracked UE/scaffold files (repo cleanup triage 20260707)

Co-authored-by: Cursor <cursoragent@cursor.com>

docs/reference/BLUEPRINT_ORGANIZATION.md

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+# Blueprint Organization Guide
+
+## Naming Conventions
+
+### Gameplay Blueprints
+- `BP_PlayerController` - Player controller
+- `BP_GameMode` - Game mode  
+- `BP_PlayerCharacter` - Player character
+- `BP_InteractionBase` - Base interaction class
+
+### System Blueprints
+- `BP_WeatherSystem` - Weather management
+- `BP_DayNightCycle` - Time of day system
+- `BP_VehicleSpawner` - Vehicle spawning
+- `BP_NPCSpawner` - NPC spawning
+
+### UI Blueprints
+- `WBP_MainMenu` - Main menu widget
+- `WBP_HUD` - HUD widget
+- `WBP_InteractionPrompt` - Interaction UI
+
+## Folder Structure
+
+```
+Content/Blueprints/
+├── Gameplay/
+│   ├── Player/
+│   ├── Interactions/
+│   └── Systems/
+├── UI/
+│   ├── Menus/
+│   └── HUD/
+└── Systems/
+    ├── Weather/
+    ├── Time/
+    └── NPCs/
+```