Move PolySharp from compiler to be used within Core, Extensions, Plugins

Author: austinv900

src/Oxide.Common.csproj

@@ -16,12 +16,19 @@
     <NoWarn>NU1701</NoWarn>
     <RootNamespace>$(MSBuildProjectName.Replace(" ", "_").Replace(".Common", ""))</RootNamespace>
     <PackageId>Oxide.Common</PackageId>
+    <LangVersion>Latest</LangVersion>
+    <PolySharpUsePublicAccessibilityForGeneratedTypes>True</PolySharpUsePublicAccessibilityForGeneratedTypes>
+    <PolySharpIncludeRuntimeSupportedAttributes>True</PolySharpIncludeRuntimeSupportedAttributes>
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Oxide.References" Version="2.0.*">
       <PrivateAssets>contentfiles;analyzers;build</PrivateAssets>
     </PackageReference>
     <None Include="..\resources\icon.png" Pack="true" PackagePath="\" />
+    <PackageReference Include="PolySharp" Version="1.13.2">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
   </ItemGroup>
   <Import Project="Sdk.targets" Sdk="Microsoft.NET.Sdk" />
   <Target Name="ChangeAliasesOfStrongNameAssemblies" BeforeTargets="FindReferenceAssembliesForReferences;ResolveReferences">