fix: include NuGet project in release source

.gitignore

@@ -30,6 +30,8 @@
 /[Aa]ssets/Plugins/Editor/JetBrains*
 # Jetbrains Rider personal-layer settings
 *.DotSettings.user
+!DotNet~/*.csproj
+!DotNet~/**/*.csproj
 /DotNet~/**/[Bb]in/
 /DotNet~/**/[Oo]bj/
 /Godot~/**/[Bb]in/
@@ -116,3 +118,5 @@ InitTestScene*.unity*
 /Tools~/**/[Oo]bj/
 *.user
 *.DotSettings.user
+!DotNet~/*.csproj
+!DotNet~/**/*.csproj

DotNet~/ShrinkSDK.EventBus.csproj

@@ -0,0 +1,19 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <TargetFramework>netstandard2.1</TargetFramework>
+    <EnableDefaultCompileItems>false</EnableDefaultCompileItems>
+    <AssemblyName>ShrinkEventBus.Runtime</AssemblyName>
+    <RootNamespace>ShrinkEventBus</RootNamespace>
+    <PackageId>ShrinkSDK.EventBus</PackageId>
+    <Version>2.1.0</Version>
+    <Description>ShrinkSDK typed event bus runtime.</Description>
+    <ShrinkCodeGenEnabled>false</ShrinkCodeGenEnabled>
+  </PropertyGroup>
+  <ItemGroup>
+    <Compile Include="..\Runtime\**\*.cs"
+             Exclude="..\Runtime\ShrinkMonoEventScope.cs" />
+    <PackageReference Include="UniTask" Version="2.5.10" />
+    <PackageReference Include="ShrinkSDK.CodeGen" Version="0.1.0" PrivateAssets="compile;runtime;contentfiles;native" />
+    <PackageReference Include="ShrinkSDK.Runtime.Abstractions" Version="0.1.0" />
+  </ItemGroup>
+</Project>