[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/IPluginManagementService.cs

@@ -0,0 +1,53 @@
+using System;
+using System.Collections.Immutable;
+using System.Reflection;
+using Barotrauma.LuaCs.Data;
+using Microsoft.CodeAnalysis;
+
+namespace Barotrauma.LuaCs.Services;
+
+public interface IPluginManagementService : IReusableService
+{
+    /// <summary>
+    /// Checks if an assembly with either the fully-qualified name globally or a 'friendly name' within loaded plugins
+    /// with the given name is loaded. 
+    /// </summary>
+    /// <param name="friendlyName"></param>
+    /// <returns></returns>
+    bool IsAssemblyLoadedGlobal(string friendlyName);
+    
+    // TODO: Documentation.
+    FluentResults.Result<ImmutableArray<T>> GetTypes<T>(
+        ContentPackage package = null,
+        string namespacePrefix = null,
+        bool includeInterfaces = false,
+        bool includeAbstractTypes = false,
+        bool includeDefaultContext = true,
+        bool includeExplicitAssembliesOnly = false);
+    
+    /// <summary>
+    /// Gets the assembly <c>MetadataReference</c> collection for the BCL and base game assemblies. 
+    /// </summary>
+    /// <returns></returns>
+    ImmutableArray<MetadataReference> GetStandardMetadataReferences();
+    
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <returns></returns>
+    ImmutableArray<MetadataReference> GetPluginMetadataReferences();
+
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="package"></param>
+    /// <returns></returns>
+    FluentResults.Result<ImmutableArray<IAssemblyResourceInfo>> GetCachedAssembliesForPackage(ContentPackage package);
+
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="resource"></param>
+    /// <returns>Success/Failure and list of failed resources, if any.</returns>
+    FluentResults.Result<ImmutableArray<IAssemblyResourceInfo>> LoadAssemblyResources(ImmutableArray<IAssemblyResourceInfo> resource);
+}