feat(expansions): Adds expansion.json and loads expansions dynamically (#798)

Moves hardcoded expansion settings to the file Data\expansion.json.

Projects/Server.Tests/Fixtures/ServerFixture.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Reflection;
 
 namespace Server.Tests
 {
@@ -7,8 +8,8 @@ namespace Server.Tests
         // Global setup
         static ServerFixture()
         {
+            Core.Assembly = Assembly.GetExecutingAssembly();
             Core.LoopContext = new EventLoopContext();
-
             Core.Expansion = Expansion.EJ;
 
             // Load Configurations

Projects/Server.Tests/Server.Tests.csproj

@@ -10,5 +10,9 @@
         <PackageReference Include="Zlib.Bindings" Version="1.5.0" />
         <ProjectReference Include="..\Server\Server.csproj" />
         <ProjectReference Include="..\UOContent\UOContent.csproj" />
+        <DataFiles Include="$(SolutionDir)\Distribution\Data\**" />
     </ItemGroup>
+    <Target Name="CopyData" AfterTargets="AfterBuild">
+        <Copy SourceFiles="@(DataFiles)" DestinationFolder="$(OutDir)\Data\%(RecursiveDir)" />
+    </Target>
 </Project>