Add samples projects to a solution

This starts the process of refactoring the samples to not be inline.
Instead, this change creates a solution that the samples are added to in
order to validate they are correct (and enable refactoring much easier
in the future). This adds a script in the samples directory that helps
scaffold out a new sample project.

Author: twsouthwick

.github/workflows/samples.yml

@@ -0,0 +1,21 @@
+name: Samples compilation
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: Setup .NET
+      uses: actions/setup-dotnet@v3
+      with:
+        dotnet-version: 8.x
+    - name: Build
+      run: dotnet build samples/samples.sln /p:TreatWarningsAsErrors=true