Added project for building dll file

Cogwheel.csproj

@@ -7,4 +7,8 @@
         <Nullable>enable</Nullable>
     </PropertyGroup>
 
+    <ItemGroup>
+      <Content Include="src\CogwheelLib.csproj" />
+    </ItemGroup>
+
 </Project>

src/CogwheelLib.csproj

@@ -0,0 +1,24 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Library</OutputType>
+    <TargetFramework>net9.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
+    <PackageId>Cogwheel</PackageId>
+    <Version>1.0.0</Version>
+    <Authors>Chris Bell</Authors>
+    <Company>Bellsworne Tech</Company>
+    <Description>A suite of development tools for games</Description>
+    <PackageTags>tools;gamedevelopment;debug</PackageTags>
+    <RepositoryUrl>https://git.bellsworne.tech/Bellsworne/Cogwheel.git</RepositoryUrl>
+    <EnableDefaultCompileItems>false</EnableDefaultCompileItems>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <Compile Include="**\*.cs" />
+    <None Include="**\*.csproj" />
+  </ItemGroup>
+
+</Project>