[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/Processing/IConverterServiceDefinitions.cs

@@ -1,16 +1,17 @@
 using System.Collections.Generic;
 using System.Xml.Linq;
 using Barotrauma.LuaCs.Data;
+using FluentResults;
 
 namespace Barotrauma.LuaCs.Services.Processing;
 
 #region TypeDef
 
 // ReSharper disable once TypeParameterCanBeVariant
-public interface IConverterService<TSrc, TOut> : IService
+public interface IConverterService<TSrc, TOut> : IReusableService
 {
-    bool TryParseResource(TSrc src, out TOut resources);
-    bool TryParseResources(IEnumerable<TSrc> sources, out List<TOut> resources);
+    Result<TOut> TryParseResource(TSrc src);
+    Result<TOut> TryParseResources(IEnumerable<TSrc> sources);
 }
 
 public interface IXmlResourceConverterService<TOut> : IConverterService<XElement, TOut> { }