Add all missing docs

PkmnLib.Dynamic/AI/PokemonAI.cs

@@ -1,3 +1,4 @@
+using JetBrains.Annotations;
 using PkmnLib.Dynamic.Models;
 using PkmnLib.Dynamic.Models.Choices;
 using PkmnLib.Static.Moves;
@@ -8,12 +9,13 @@ namespace PkmnLib.Dynamic.AI;
 /// <summary>
 /// The base class for implementing an AI for Pokémon.
 /// </summary>
+[PublicAPI]
 public abstract class PokemonAI
 {
     /// <summary>
     /// The name of the AI.
     /// </summary>
-    public StringKey Name { get; set; }
+    public StringKey Name { get; }
 
     /// <inheritdoc cref="PokemonAI" />
     protected PokemonAI(StringKey name)
@@ -26,9 +28,11 @@ public abstract class PokemonAI
     /// </summary>
     public abstract ITurnChoice GetChoice(IBattle battle, IPokemon pokemon);
 
+    /// <summary>
+    /// For a given user and move, returns the valid targets for that move.
+    /// </summary>
     public IEnumerable<(byte side, byte position)> GetValidTargetsForMove(IPokemon user, ILearnedMove move)
     {
-        byte GetOppositeSide(byte side) => side == 0 ? (byte)1 : (byte)0;
         var userBattleData = user.BattleData!;
         switch (move.MoveData.Target)
         {
@@ -90,5 +94,7 @@ public abstract class PokemonAI
             default:
                 throw new ArgumentOutOfRangeException();
         }
+        yield break;
+        byte GetOppositeSide(byte side) => side == 0 ? (byte)1 : (byte)0;
     }
 }