feat: add GitHub Actions workflow for release automation and package creation

.github/workflows/release.yml

@@ -0,0 +1,71 @@
+name: Release
+
+on:
+  workflow_dispatch:
+    inputs:
+      version_override:
+        description: 'Version override (optional, e.g., 1.0.0.42)'
+        required: false
+        type: string
+  push:
+    tags:
+      - 'v*'
+
+env:
+  DOTNET_VERSION: '8.0'
+
+jobs:
+  build:
+    name: Build gregExtractor
+    runs-on: windows-latest
+    
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup .NET
+        uses: actions/setup-dotnet@v4
+        with:
+          dotnet-version: ${{ env.DOTNET_VERSION }}
+
+      - name: Restore dependencies
+        run: dotnet restore gregExtractor.csproj
+
+      - name: Build Release
+        run: dotnet publish gregExtractor.csproj -c Release -o ./publish/extractor --self-contained false
+
+      - name: Create Release Package
+        shell: pwsh
+        run: |
+          $ver = "${{ github.run_number }}"
+          if ("${{ github.event.inputs.version_override }}") { $ver = "${{ github.event.inputs.version_override }}" }
+          if ("${{ github.ref }}".StartsWith("refs/tags/v")) { $ver = "${{ github.ref }}".Replace("refs/tags/v", "") }
+          $zipName = "gregExtractor-1.0.0.$ver-pre-win-x64.zip"
+          Compress-Archive -Path "./publish/extractor/*" -DestinationPath "./$zipName" -Force
+          echo "zip_name=$zipName" >> $env:GITHUB_ENV
+
+      - name: Upload Release Asset
+        uses: softprops/action-gh-release@v2
+        with:
+          draft: true
+          prerelease: true
+          files: ${{ env.zip_name }}
+          tag_name: v${{ github.run_number }}
+          name: gregExtractor v1.0.0.${{ github.run_number }}-pre
+          body: |
+            ## gregExtractor v1.0.0.${{ github.run_number }}-pre
+            
+            IL2CPP Assembly Analysis Tool for Data Center modding.
+            
+            ### Usage
+            1. Extract to folder
+            2. Run gregExtractor.exe
+            3. Select IL2CPP Assemblies folder (MelonLoader/Il2CppAssemblies)
+            4. Export categorized hooks
+            
+            ### Features
+            - IL2CPP Dummy-DLL analysis via Mono.Cecil
+            - Automatic hook categorization
+            - JSON export for gregCore mod
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}