Add manual NuGet publishing workflow

.github/workflows/publish-nuget.yml

@@ -0,0 +1,32 @@
+name: Publish NuGet tool
+
+on:
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: nuget-publish
+  cancel-in-progress: false
+
+jobs:
+  publish:
+    if: github.ref == 'refs/heads/main'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v7
+      - uses: actions/setup-dotnet@v5
+        with:
+          dotnet-version: '10.0.4xx'
+      - run: dotnet test WhyConfig.slnx -c Release
+      - run: dotnet pack src/WhyConfig.Cli/WhyConfig.Cli.csproj -c Release --no-restore -o artifacts
+      - name: Publish to NuGet.org
+        env:
+          NUGET_API_KEY: ${{ secrets.NUGET_API_KEY }}
+        run: |
+          if [ -z "$NUGET_API_KEY" ]; then
+            echo "Set the NUGET_API_KEY repository secret before publishing." >&2
+            exit 1
+          fi
+          dotnet nuget push artifacts/WhyConfig.NET.*.nupkg --source https://api.nuget.org/v3/index.json

docs/RELEASING.md

@@ -0,0 +1,10 @@
+# Releasing WhyConfig.NET
+
+The GitHub repository can stay private while the tool package is public on NuGet.org.
+
+1. Sign in to the [Benziza NuGet.org account](https://www.nuget.org/profiles/Benziza) and create a [Push API key](https://learn.microsoft.com/en-us/nuget/nuget-org/publish-a-package#create-an-api-key). For the first release, allow new packages in the key's package scope.
+2. Save the key as the `NUGET_API_KEY` secret in this repository's **Settings → Secrets and variables → Actions**. Do not commit the key.
+3. Run the **Publish NuGet tool** workflow from `main` in the Actions tab.
+4. After NuGet.org lists the package, verify installation with `dotnet tool install --global WhyConfig.NET` and `whyconfig --help`.
+
+For another release, change `Version` in `src/WhyConfig.Cli/WhyConfig.Cli.csproj`, merge it, then run the workflow again. NuGet.org does not allow replacing a published package version.

src/WhyConfig.Cli/WhyConfig.Cli.csproj

@@ -20,7 +20,7 @@
     <ToolCommandName>whyconfig</ToolCommandName>
     <PackageId>WhyConfig.NET</PackageId>
     <Version>0.1.0</Version>
-    <Authors>WhyConfig.NET</Authors>
+    <Authors>Benziza</Authors>
     <Description>Explain .NET configuration provider precedence for a key.</Description>
     <PackageReadmeFile>README.md</PackageReadmeFile>
   </PropertyGroup>