[Milestone] AssemblyLoader completed.

Details:
- Assembly Mgmt Service for loading now a separate interface, not intended for normal use.
- Assembly Loader work; implemented custom dictionary key and table.
- Assembly loading work.
- EventService completed.
- Moved assembly extensions to ModUtils.cs
- Work to event service.
NetworkService work
- Added ImpromptuInterfaces package.
- Networking Service work to support NetVars
- Event Service
- Added assemblies references package for script compilation. Updated Roslyn version for compatibility.
- Package Loading work.
Swap Harmony to HarmonyX
- More refactor conversion to FluentResults.
- Updated StylesService to return Results.
- Refactor of PackageService partially complete.
- Made IService.Reset() required to return a Result.
- Moved plugin/assembly related code to their own folder (same namespace).
- Updated interfaces to reflect the use of Result<T>.
- Partial refactor, incomplete.
- Added 'FluentResults' so we can stop using cursed Exception-based flow control in loading code.
- Added 'OneOf' nuget package: https://github.com/mcintyre321/OneOf
for the implementation of the Optional<T> pattern and complex discrete return types instead of cursed enums (see current AssemblyManager.cs).
- Reapplied old branch changes.

Barotrauma/BarotraumaShared/SharedSource/LuaCs/Services/_Interfaces/IPluginService.cs

@@ -0,0 +1,50 @@
+using System;
+using System.Collections.Generic;
+using System.Collections.Immutable;
+using System.Reflection;
+using Barotrauma.LuaCs.Data;
+
+namespace Barotrauma.LuaCs.Services;
+
+public interface IPluginService : IReusableService
+{
+    bool IsAssemblyLoaded(string friendlyName);
+    /// <summary>
+    /// Loads the assemblies for the given information
+    /// </summary>
+    /// <param name="assemblyResourcesInfo"></param>
+    /// <param name="injectServices"></param>
+    /// <param name="typeInstances"></param>
+    /// <typeparam name="T"></typeparam>
+    /// <returns></returns>
+    FluentResults.Result LoadAndInstanceTypes<T>(IEnumerable<IAssemblyResourceInfo> assemblyResourcesInfo, bool injectServices, out ImmutableArray<T> typeInstances) where T : class, IAssemblyPlugin;
+    FluentResults.Result<ImmutableArray<T>> GetLoadedPluginTypesInPackage<T>() where T : class, IAssemblyPlugin;
+    /// <summary>
+    /// Advances the loading/execution state of the plugin. IMPORTANT: You cannot set the execution state of plugins
+    /// to 'Disposed'. You must instead call the 'DisposePlugins' method. 
+    /// </summary>
+    /// <param name="newState"></param>
+    /// <returns></returns>
+    FluentResults.Result AdvancePluginStates(PluginRunState newState);
+
+    /// <summary>
+    /// Disposes of all running plugins hosted by the service and releases their references to allow unloading.
+    /// </summary>
+    /// <returns>Success of the operation. Returns false if any plugin threw errors during disposal.</returns>
+    FluentResults.Result DisposePlugins();
+
+    /// <summary>
+    /// Gets the current plugin execution state.
+    /// </summary>
+    /// <returns></returns>
+    PluginRunState GetPluginRunState();
+}
+
+public enum PluginRunState
+{
+    Instanced=0, 
+    PreInitialization=1, 
+    Initialized=2, 
+    LoadingCompleted=3, 
+    Disposed=4
+}