build: add NuGet publish workflow + bump to v0.5.0

- Create .github/workflows/publish.yml (triggers on GitHub release)
- Bump version from 0.1.0 to 0.5.0
- Add symbol package support (snupkg)
- Update docs/dotnet-tool-install.md

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: elbruno

.github/workflows/publish.yml

@@ -0,0 +1,37 @@
+name: Publish to NuGet
+
+on:
+  release:
+    types: [published]
+
+permissions:
+  contents: read
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup .NET
+        uses: actions/setup-dotnet@v4
+        with:
+          dotnet-version: 10.0.x
+
+      - name: Restore dependencies
+        run: dotnet restore graphify-dotnet.slnx
+
+      - name: Build in Release mode
+        run: dotnet build graphify-dotnet.slnx --configuration Release --no-restore
+
+      - name: Run all tests
+        run: dotnet test graphify-dotnet.slnx --configuration Release --no-build --verbosity normal
+
+      - name: Pack the tool
+        run: dotnet pack src/Graphify.Cli/Graphify.Cli.csproj --configuration Release --no-build -o ./nupkg
+
+      - name: Push to NuGet.org
+        run: dotnet nuget push ./nupkg/*.nupkg --api-key ${{ secrets.NUGET_API_KEY }} --source https://api.nuget.org/v3/index.json --skip-duplicate

docs/dotnet-tool-install.md

@@ -29,7 +29,7 @@ dotnet --version
 
 ### Method 1: From NuGet (Recommended)
 
-Once graphify-dotnet is published to NuGet.org:
+Starting with v0.5.0, graphify-dotnet is published on [NuGet.org](https://www.nuget.org/packages/graphify-dotnet). Install with:
 
 ```bash
 dotnet tool install -g graphify-dotnet

src/Graphify.Cli/Graphify.Cli.csproj

@@ -6,14 +6,16 @@
     <PackAsTool>true</PackAsTool>
     <ToolCommandName>graphify</ToolCommandName>
     <PackageId>graphify-dotnet</PackageId>
-    <Version>0.1.0</Version>
+    <Version>0.5.0</Version>
     <Description>AI-powered knowledge graph builder for codebases</Description>
     <Authors>Bruno Capuano</Authors>
     <PackageProjectUrl>https://github.com/elbruno/graphify-dotnet</PackageProjectUrl>
     <PackageLicenseExpression>MIT</PackageLicenseExpression>
     <PackageReadmeFile>README.md</PackageReadmeFile>
     <PackageIcon>nuget_logo.png</PackageIcon>
     <RepositoryUrl>https://github.com/elbruno/graphify-dotnet</RepositoryUrl>
+    <IncludeSymbols>true</IncludeSymbols>
+    <SymbolPackageFormat>snupkg</SymbolPackageFormat>
     <UserSecretsId>graphify-dotnet-3134eb8e-5948-4541-b6e4-ab9f52f3df62</UserSecretsId>
   </PropertyGroup>