feat(plugin): 添加 NuGet 包发布配置

- 添加包元数据到 csproj
- 创建 nuget.yml 发布工作流

.gitea/workflows/nuget.yml

@@ -0,0 +1,40 @@
+name: Build and Publish NuGet Package
+
+on:
+  push:
+    branches: [main]
+    paths:
+      - 'src/Fengling.Gateway.Plugin.Abstractions/**'
+  release:
+    types: [published]
+
+env:
+  REGISTRY: gitea.shtao1.cn
+  PACKAGE_NAME: Fengling.Gateway.Plugin.Abstractions
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup .NET
+        uses: actions/setup-dotnet@v4
+        with:
+          dotnet-version: '10.0.103'
+
+      - name: Restore dependencies
+        run: dotnet restore src/Fengling.Gateway.Plugin.Abstractions/Fengling.Gateway.Plugin.Abstractions.csproj
+
+      - name: Build
+        run: dotnet build src/Fengling.Gateway.Plugin.Abstractions/Fengling.Gateway.Plugin.Abstractions.csproj --configuration Release --no-restore
+
+      - name: Pack
+        run: dotnet pack src/Fengling.Gateway.Plugin.Abstractions/Fengling.Gateway.Plugin.Abstractions.csproj --configuration Release --no-build -o ./nupkg
+
+      - name: Publish to Gitea
+        run: |
+          dotnet nuget push ./nupkg/*.nupkg \
+            --source ${{ env.REGISTRY }}/api/packages/${{ github.repository_owner }}/nuget/index.json \
+            --username fengling \
+            --password ${{ secrets.GITEATOKEN }}

src/Fengling.Gateway.Plugin.Abstractions/Fengling.Gateway.Plugin.Abstractions.csproj

@@ -5,6 +5,14 @@
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <RootNamespace>Fengling.Gateway.Plugin.Abstractions</RootNamespace>
+    
+    <!-- NuGet Package Metadata -->
+    <PackageId>Fengling.Gateway.Plugin.Abstractions</PackageId>
+    <Version>1.0.0</Version>
+    <Authors>Fengling</Authors>
+    <Company>Fengling</Company>
+    <Product>Fengling Gateway Plugin</Product>
+    <Description>Gateway plugin abstractions for YARP reverse proxy</Description>
   </PropertyGroup>
 
   <ItemGroup>