fix: clean gitignore for Godot C#

Scripts/Core/RotatingComponent.cs

@@ -0,0 +1,58 @@
+using System;
+
+public abstract class RotatingComponent
+{
+    public double MomentOfInertia { get; set; }   // kg·m²
+    public double AngularVelocity { get; set; }   // rad/s
+    public double AngularPosition { get; set; }   // rad (0..2π, wrapped)
+    public double TotalAngularPosition { get; set; } // rad (never wraps)
+    public double AccumulatedTorque {get; private set; }
+
+    public RotatingComponent(double momentOfInertia = 0.1, double angularVelocity = 0, double angularPosition = 0)
+    {
+        MomentOfInertia = momentOfInertia;
+        AngularVelocity = angularVelocity;
+        AngularPosition = angularPosition;
+        TotalAngularPosition = angularPosition;
+        AccumulatedTorque = 0;
+    }
+
+    public virtual void ApplyTorque(double torqueNm)
+    {
+        AccumulatedTorque += torqueNm;
+    }
+
+    public virtual void Update(double dt)
+    {
+        if (dt <= 0) return;
+
+        if (MomentOfInertia > 0)
+        {
+            double angularAcceleration = AccumulatedTorque / MomentOfInertia;
+            AngularVelocity += angularAcceleration * dt;
+        }
+
+        double deltaAngle = AngularVelocity * dt;
+        TotalAngularPosition += deltaAngle;
+        AngularPosition += deltaAngle;
+
+        // Wrap AngularPosition to 0..2π for sin/cos
+        AngularPosition = AngularPosition % (2 * Math.PI);
+        if (AngularPosition < 0) AngularPosition += 2 * Math.PI;
+
+        AccumulatedTorque = 0;
+    }
+
+    public double RPM => AngularVelocity * 60 / (2 * Math.PI);
+    public double TotalAngleDeg => TotalAngularPosition * 180 / Math.PI;
+
+    public void SetRPM(double rpm)
+    {
+        AngularVelocity = rpm * 2 * Math.PI / 60;
+    }
+
+    public virtual void ResetTorque()
+    {
+        AccumulatedTorque = 0;
+    }
+}