[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/BarotraumaClient/ClientSource/LuaCs/Services/PackageService.cs

@@ -9,10 +9,10 @@ namespace Barotrauma.LuaCs.Services;
 public partial class PackageService : IStylesResourcesInfo
 {
     private readonly Lazy<IStylesService> _stylesService;
+    public IStylesService Styles => _stylesService.Value;
     
     public PackageService(
-        Lazy<IXmlModConfigConverterService> converterService, 
-        Lazy<ILegacyConfigService> legacyConfigService,
+        Lazy<IModConfigParserService> configParserService,
         Lazy<ILuaScriptService> luaScriptService,
         Lazy<ILocalizationService> localizationService,
         Lazy<IPluginService> pluginService,
@@ -22,8 +22,7 @@ public partial class PackageService : IStylesResourcesInfo
         IStorageService storageService,
         ILoggerService loggerService)
     {
-        _modConfigConverterService = converterService;
-        _legacyConfigService = legacyConfigService;
+        _configParserService = configParserService;
         _luaScriptService = luaScriptService;
         _localizationService = localizationService;
         _pluginService = pluginService;
@@ -36,7 +35,7 @@ public partial class PackageService : IStylesResourcesInfo
 
     public ImmutableArray<IStylesResourceInfo> StylesResourceInfos => ModConfigInfo?.StylesResourceInfos ?? ImmutableArray<IStylesResourceInfo>.Empty;
 
-    public void LoadStyles([NotNull]IStylesResourcesInfo stylesInfo)
+    public FluentResults.Result LoadStyles([NotNull]IStylesResourcesInfo stylesInfo)
     {
         throw new NotImplementedException();
     }