Added first visual-scripting draft [WIP]

src/Artemis.VisualScripting/Internal/ExitNode.cs

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+using Artemis.Core.VisualScripting;
+using Artemis.VisualScripting.Model;
+
+namespace Artemis.VisualScripting.Internal
+{
+    internal interface IExitNode : INode
+    { }
+
+    internal class ExitNode<T> : Node, IExitNode
+    {
+        #region Properties & Fields
+
+        public InputPin<T> Input { get; }
+
+        public T Value { get; private set; }
+
+        #endregion
+
+        #region Constructors
+
+        public ExitNode(string name, string description = "")
+        {
+            this.Name = name;
+            this.Description = description;
+
+            Input = CreateInputPin<T>();
+        }
+
+        #endregion
+
+        #region Methods
+
+        public override void Evaluate()
+        {
+            Value = Input.Value;
+        }
+
+        #endregion
+    }
+}

src/Artemis.VisualScripting/Internal/IsConnectingPin.cs

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+using System;
+using Artemis.VisualScripting.Model;
+
+namespace Artemis.VisualScripting.Internal
+{
+    internal class IsConnectingPin : Pin
+    {
+        #region Properties & Fields
+
+        public override PinDirection Direction { get; }
+        public override Type Type { get; } = typeof(object);
+        public override object PinValue => null;
+
+        #endregion
+
+        #region Constructors
+
+        public IsConnectingPin(PinDirection direction)
+            : base(null, null)
+        {
+            this.Direction = direction;
+        }
+
+        #endregion
+    }
+}