Add GitHub CI and Publish to GitHub packages only

Author: daramkun

.github/workflows/publish.yml

@@ -0,0 +1,42 @@
+name: Publish .NET Package
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+permissions:
+  contents: read
+  packages: write
+
+jobs:
+  build-and-publish:
+    runs-on: macos-latest
+    
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v5
+        
+      - name: Setup .NET
+        uses: actions/setup-dotnet@v5
+        with:
+          dotnet-version: 10.0.x
+          source-url: https://nuget.pkg.github.com/${{github.repository_owner}}/index.json
+        env: 
+          NUGET_AUTH_TOKEN: ${{secrets.GITHUB_TOKEN}}
+          
+      - name: Install Workloads
+        run: dotnet workload install android macos ios tvos maccatalyst --ignore-failed-sources
+          
+      - name: Restore
+        run: dotnet restore
+        
+      - name: Building
+        run: dotnet build --configuration Release --no-restore
+        
+      - name: Packaging
+        run: dotnet pack --configuration Release --no-build --output .
+        
+      - name: Publishing
+        if: github.event_name == 'push'
+        run: dotnet nuget push *.nupkg --api-key ${{secrets.GITHUB_TOKEN}}

README.md

@@ -3,15 +3,22 @@
 `Hazelnut.Log` is Logging framework.
 
 ```shell
-$ # Using Nuget Package Manager Console
-$ nuget Install-Package Hazelnut.Log
+$ # Add Package Source of GitHub to .NET
+$ # This is required before add package
+$ dotnet nuget add source "https://nuget.pkg.github.com/daramkun/index.json" \
+  --name "GitHub" \
+  --username "<YOUR GITHUB USERNAME>" \
+  --password "<YOUR PAT TOKEN>" \
+  --store-password-in-clear-text
 ```
 
 ```shell
 $ # Using .NET CLI
 $ dotnet add package Hazelnut.Log
 ```
 
+or
+
 ```xml
 <!-- Using csproj -->
 <PackageReference Include="Hazelnut.Log" Version="1.0.1" />