Initial project setup: RoadRunner (Multi-loader Stonecutter Template)

PLAN.md

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+# RoadRunner Development Plan
+
+## Phase 1: The Foundation (Setup)
+- [x] Initialize Project Boilerplate (Stonecutter/Architectury)
+- [x] Configure Project Metadata (RoadRunner, com.bnair.roadrunner)
+- [ ] User: Install Java 21 and IntelliJ IDEA
+- [ ] User: Run `./gradlew build` to verify setup
+
+## Phase 2: The Mathematician (Core Logic)
+- [ ] Implement `BezierCurve` class (Cubic Bezier math)
+- [ ] Implement `RoadProfile` data structure:
+    - Lanes (Width, Type, Material)
+    - Banking logic
+    - Snapping logic (Tangents)
+- [ ] Create debug "Planner Item" to visualize curves with particles
+
+## Phase 3: The Architect (GUI & Blueprints)
+- [ ] Integrate **Owo-lib** for GUI
+- [ ] Create "Blueprint Planner" item
+- [ ] Implement Top-Down Map GUI (DrawContext)
+- [ ] Implement "Ghost" rendering for planned roads (WorldRenderEvents)
+
+## Phase 4: The Foreman (Survival Mechanics)
+- [ ] Create "Site Office" Block
+- [ ] Implement Resource Consumption logic
+- [ ] Implement "Virtual Crew" construction mechanic (Progressive building)
+- [ ] Add sound effects and particles for construction
+
+## Phase 5: The Civil Engineer (Advanced Features)
+- [ ] Terrain Mode: "Follow Terrain" vs "Cut & Fill"
+- [ ] Bridges and Tunnels automation
+- [ ] "Demolition Tool" with undo capability
+
+## Technical Decisions
+- **Loader:** Multi-loader (Fabric & NeoForge) via Architectury & Stonecutter
+- **Language:** Kotlin
+- **GUI Lib:** Owo-lib
+- **Rendering:** Fabric API / Architectury Rendering API