Revert "- Removed ACsMod.cs"

This reverts commit 54a3e2e5de0cff38ea4fc3750d2eb90f5ea73fe9.

Barotrauma/BarotraumaShared/SharedSource/LuaCs/_Plugins/ACsMod.cs

@@ -0,0 +1,64 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+
+namespace Barotrauma
+{
+    [Obsolete("Make your class implement IAssemblyPlugin instead.")]
+    public abstract class ACsMod : IAssemblyPlugin
+    {
+        private static List<ACsMod> mods = new List<ACsMod>();
+        public static List<ACsMod> LoadedMods { get => mods; }
+
+        private const string MOD_STORE = "LocalMods/.modstore";
+        public static string GetStoreFolder<T>() where T : ACsMod
+        {
+            if (!Directory.Exists(MOD_STORE)) Directory.CreateDirectory(MOD_STORE);
+            var modFolder = $"{MOD_STORE}/{typeof(T)}";
+            if (!Directory.Exists(modFolder)) Directory.CreateDirectory(modFolder);
+            return modFolder;
+        }
+
+        public bool IsDisposed { get; private set; }
+
+        /// Mod initialization
+        public ACsMod()
+        {
+            IsDisposed = false;
+            LoadedMods.Add(this);
+        }
+
+        /// <summary>
+        /// Called as soon as plugin loading begins, use this for internal setup only.
+        /// </summary>
+        public virtual void Initialize() { }
+
+        /// <summary>
+        /// Called once all plugins have completed Initialization. Put cross-mod code here.
+        /// </summary>
+        public virtual void OnLoadCompleted() { }
+
+        /// <summary>
+        /// [NotImplemented] Called before vanilla content is loaded. Use to patch Barotrauma classes before they're
+        /// instantiated.
+        /// </summary>
+        public void PreInitPatching() { }
+
+        public virtual void Dispose()
+        {
+            try
+            {
+                Stop();
+            }
+            catch (Exception e)
+            {
+                LuaCsLogger.HandleException(e, LuaCsMessageOrigin.CSharpMod);
+            }
+
+            LoadedMods.Remove(this);
+            IsDisposed = true;
+        }
+        
+        public abstract void Stop();
+    }
+}