switch to net9 and slnx

Author: jogibear9988

.github/workflows/dotnet.yml

@@ -16,7 +16,7 @@ jobs:
     - name: Setup .NET
       uses: actions/setup-dotnet@v1
       with:
-        dotnet-version: 8.0.x
+        dotnet-version: 9.0.x
 
     - name: GitVersion
       id: gitversion  # step id used as reference for output values

.github/workflows/dotnetpull.yml

@@ -14,7 +14,7 @@ jobs:
     - name: Setup .NET
       uses: actions/setup-dotnet@v1
       with:
-        dotnet-version: 8.0.x
+        dotnet-version: 9.0.x
     - name: Restore dependencies
       run: dotnet restore
     - name: Build

TiaCodeGen.Tests/TiaCodeGen.Tests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
   </PropertyGroup>
 
   <ItemGroup>

TiaCodegen.sln

@@ -0,0 +1,4 @@
+<Solution>
+  <Project Path="TiaCodeGen.Tests/TiaCodeGen.Tests.csproj" />
+  <Project Path="TiaCodegen/DotNetProjects.TiaCodegen.csproj" />
+</Solution>