Lots more work on implementing battling

PkmnLib.Dynamic/Events/SwitchEvent.cs

@@ -0,0 +1,35 @@
+using PkmnLib.Dynamic.Models;
+
+namespace PkmnLib.Dynamic.Events;
+
+/// <summary>
+/// Event triggered when a Pokémon is switched in.
+/// </summary>
+public class SwitchEvent : IEventData
+{
+    /// <inheritdoc cref="SwitchEvent"/>
+    public SwitchEvent(byte sideIndex, byte position, IPokemon? pokemon)
+    {
+        SideIndex = sideIndex;
+        Position = position;
+        Pokemon = pokemon;
+    }
+
+    /// <summary>
+    /// The index of the side that the Pokémon is switching in on.
+    /// </summary>
+    public byte SideIndex { get; init; }
+
+    /// <summary>
+    /// The position that the Pokémon is switching in to.
+    /// </summary>
+    public byte Position { get; init; }
+
+    /// <summary>
+    /// The Pokémon that is switching in. If null, no Pokémon is switching in, and the slot is empty after the switch.
+    /// </summary>
+    public IPokemon? Pokemon { get; init; }
+
+    /// <inheritdoc />
+    public EventBatchId BatchId { get; init; }
+}