[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/Configuration/IDisplayableConfig.cs

@@ -1,66 +0,0 @@
-using System.Numerics;
-using Microsoft.Xna.Framework;
-
-namespace Barotrauma.LuaCs.Configuration;
-
-/// <summary>
-/// Contains the Display Data for use with Menus.
-/// </summary>
-public interface IDisplayableData
-{
-    /// <summary>
-    /// Internal name of the instance.
-    /// </summary>
-    string Name { get; }
-    /// <summary>
-    /// Internal mod name of the instance. ContentPackage name will be used by default.
-    /// </summary>
-    string ModName { get; } 
-    /// <summary>
-    /// The name to display in GUIs and Menus.
-    /// </summary>
-    string DisplayName { get; }
-    /// <summary>
-    /// The mod name to display in GUIs and Menus.
-    /// </summary>
-    string DisplayModName { get; } 
-    /// <summary>
-    /// Category this instance falls under. Used by menus when filtering by category.
-    /// </summary>
-    string DisplayCategory { get; } 
-    /// <summary>
-    /// The tooltip shown on hover.
-    /// </summary>
-    string Tooltip { get; } 
-    /// <summary>
-    /// The fully qualified filepath to the image icon for this config.
-    /// </summary>
-    string ImageIcon { get; } 
-    /// <summary>
-    /// Required if ImageIcon is set. X,Y resolution of the image.
-    /// </summary>
-    Point IconResolution { get; }
-    /// <summary>
-    /// Whether to show the entry in the menu when not loaded.
-    /// </summary>
-    bool ShowWhenNotLoaded { get; }
-}
-
-public interface IDisplayableInitialize
-{
-    void Initialize(IDisplayableData values);
-    
-    // copy this as needed
-    /*public void Initialize(IDisplayableData values)
-    {
-        this.Name = values.Name;
-        this.ModName = values.ModName;
-        this.DisplayName = values.DisplayName;
-        this.DisplayModName = values.DisplayModName;
-        this.DisplayCategory = values.DisplayCategory;
-        this.Tooltip = values.Tooltip;
-        this.ImageIcon = values.ImageIcon;
-        this.IconResolution = values.IconResolution;
-        this.ShowWhenNotLoaded = values.ShowWhenNotLoaded;
-    }*/
-}