chore,gd: refactored project structure and started the mantle system

player_controller/Examples/MovementTestbed/LowGravityArea3D.cs

@@ -0,0 +1,33 @@
+using Godot;
+
+// This script is an example of how you can create game systems that
+// interact with PlayerController. This script applies a low gravity effect
+// to any PlayerController that enters the Area3D. It does this by modifying
+// the value of AdditionalGravityPower owned by the Gravity child of
+// PlayerController.
+
+namespace PolarBears.PlayerControllerAddon;
+
+public partial class LowGravityArea3D : Area3D
+{
+	[Export] public float GravityReduction { set; get; } = 0.4f;
+
+	public override void _Ready()
+	{
+		BodyEntered += (Node3D body) =>
+		{
+			if (body is PlayerController player) {
+				player.Gravity.AdditionalGravityPower *= GravityReduction;
+				GD.Print("Low Gravity Zone Entered");
+			}
+		};
+		BodyExited += (Node3D body) =>
+		{
+			if (body is PlayerController player) {
+				player.Gravity.AdditionalGravityPower /= GravityReduction;
+				GD.Print("Low Gravity Zone Exited");
+			}
+		};
+	}
+}
+