Split off last bot modules

And dissolve AI namespace.
There would have been so little left in Common.AI,
that keeping it made no sense anymore.

OpenRA.Mods.Common/Traits/BotModules/Squads/States/ProtectionStates.cs

@@ -0,0 +1,82 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2018 The OpenRA Developers (see AUTHORS)
+ * This file is part of OpenRA, which is free software. It is made
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version. For more
+ * information, see COPYING.
+ */
+#endregion
+
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.Common.Traits.BotModules.Squads
+{
+	class UnitsForProtectionIdleState : GroundStateBase, IState
+	{
+		public void Activate(Squad owner) { }
+		public void Tick(Squad owner) { owner.FuzzyStateMachine.ChangeState(owner, new UnitsForProtectionAttackState(), true); }
+		public void Deactivate(Squad owner) { }
+	}
+
+	class UnitsForProtectionAttackState : GroundStateBase, IState
+	{
+		public const int BackoffTicks = 4;
+		internal int Backoff = BackoffTicks;
+
+		public void Activate(Squad owner) { }
+
+		public void Tick(Squad owner)
+		{
+			if (!owner.IsValid)
+				return;
+
+			if (!owner.IsTargetValid)
+			{
+				owner.TargetActor = owner.SquadManager.FindClosestEnemy(owner.CenterPosition, WDist.FromCells(owner.SquadManager.Info.ProtectionScanRadius));
+
+				if (owner.TargetActor == null)
+				{
+					owner.FuzzyStateMachine.ChangeState(owner, new UnitsForProtectionFleeState(), true);
+					return;
+				}
+			}
+
+			if (!owner.IsTargetVisible)
+			{
+				if (Backoff < 0)
+				{
+					owner.FuzzyStateMachine.ChangeState(owner, new UnitsForProtectionFleeState(), true);
+					Backoff = BackoffTicks;
+					return;
+				}
+
+				Backoff--;
+			}
+			else
+			{
+				foreach (var a in owner.Units)
+					owner.Bot.QueueOrder(new Order("AttackMove", a, Target.FromCell(owner.World, owner.TargetActor.Location), false));
+			}
+		}
+
+		public void Deactivate(Squad owner) { }
+	}
+
+	class UnitsForProtectionFleeState : GroundStateBase, IState
+	{
+		public void Activate(Squad owner) { }
+
+		public void Tick(Squad owner)
+		{
+			if (!owner.IsValid)
+				return;
+
+			GoToRandomOwnBuilding(owner);
+			owner.FuzzyStateMachine.ChangeState(owner, new UnitsForProtectionIdleState(), true);
+		}
+
+		public void Deactivate(Squad owner) { owner.Units.Clear(); }
+	}
+}