NPC refactor (#10122)

Co-authored-by: metalgearsloth <metalgearsloth@gmail.com>

Content.Server/NPC/Systems/NPCCombatSystem.cs

@@ -0,0 +1,35 @@
+using Content.Server.Interaction;
+using Content.Server.Weapon.Ranged.Systems;
+using Content.Shared.CombatMode;
+using Content.Shared.Interaction;
+using Robust.Shared.Map;
+using Robust.Shared.Timing;
+
+namespace Content.Server.NPC.Systems;
+
+/// <summary>
+/// Handles combat for NPCs.
+/// </summary>
+public sealed partial class NPCCombatSystem : EntitySystem
+{
+    [Dependency] private readonly IGameTiming _timing = default!;
+    [Dependency] private readonly IMapManager _mapManager = default!;
+    [Dependency] private readonly GunSystem _gun = default!;
+    [Dependency] private readonly InteractionSystem _interaction = default!;
+    [Dependency] private readonly SharedAudioSystem _audio = default!;
+    [Dependency] private readonly SharedTransformSystem _transform = default!;
+
+    public override void Initialize()
+    {
+        base.Initialize();
+        InitializeMelee();
+        InitializeRanged();
+    }
+
+    public override void Update(float frameTime)
+    {
+        base.Update(frameTime);
+        UpdateMelee(frameTime);
+        UpdateRanged(frameTime);
+    }
+}