replace release flow single job with pr process

.github/workflows/prepare_release_pr.yml

@@ -0,0 +1,40 @@
+name: Create Release PR
+
+on:
+  workflow_dispatch
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  bump_version:
+    runs-on: windows-2022
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Calculate next version
+        id: version
+        run: |
+          $newVer = .\tools\get-next-main-version.ps1
+          echo "NEW_VERSION=$newVer" >> $env:GITHUB_ENV
+          .\tools\set-version.ps1 $newVer -UpdateAssemblyAndFileVersion
+
+          git config user.name "github-actions"
+          git config user.email "github-actions@github.com"
+
+          git checkout -b release/$newVer
+          git commit -am "Release $newVer"
+
+      - name: Create Pull Request
+        uses: peter-evans/create-pull-request@v6
+        with:
+          branch: release/${{ env.NEW_VERSION }}
+          base: master
+          title: "Release ${{ env.NEW_VERSION }}"
+          body: "Automated release PR."
+          delete-branch: true
+          merge-method: rebase

.github/workflows/publish_nuget.yml

@@ -0,0 +1,53 @@
+name: Publish
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+permissions:
+  contents: write
+  packages: write
+
+jobs:
+  build_and_publish:
+    runs-on: windows-2022
+
+    steps:
+      - uses: actions/checkout@v4
+      - name: Verify tag points to master
+        id: verify
+        run: |
+          TAG_COMMIT=$(git rev-list -n 1 ${{ github.ref_name }})
+          if ! git branch -r --contains $TAG_COMMIT | grep -q 'origin/master'; then
+            echo "Tag is not on master — skipping publish"
+            exit 78  # 78 = neutral in GitHub Actions
+          fi
+
+      - name: Set up .NET
+        uses: actions/setup-dotnet@v4
+        with:
+          dotnet-version: |
+            2.1.x
+            6.0.x
+            8.0.x
+            9.0.x
+
+      - name: Add msbuild to PATH
+        uses: microsoft/setup-msbuild@v2
+
+      - name: Run tests
+        run: dotnet test -c Release src/UglyToad.PdfPig.sln
+
+      - name: Build package
+        run: dotnet pack -c Release -o package tools/UglyToad.PdfPig.Package/UglyToad.PdfPig.Package.csproj -p:IncludeSymbols=true -p:SymbolPackageFormat=snupkg
+
+      - name: Publish to NuGet
+        run: dotnet nuget push package/*.nupkg --api-key ${{secrets.NUGET_API_KEY}} --source https://api.nuget.org/v3/index.json
+
+      - name: Create GitHub Release
+        uses: softprops/action-gh-release@v2
+        with:
+          tag_name: ${{ github.ref_name }}
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/tag_release.yml

@@ -0,0 +1,43 @@
+name: Tag Release
+
+on:
+  push:
+    branches:
+      - master
+
+permissions:
+  contents: write
+
+jobs:
+  tag_if_version_changed:
+    if: startsWith(github.event.head_commit.message, 'Release ')
+    runs-on: windows-2022
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Detect version change
+        id: versioncheck
+        run: |
+          git fetch origin master --depth=2
+
+          $diff = git diff HEAD^ HEAD -- tools/UglyToad.PdfPig.Package/UglyToad.PdfPig.Package.csproj
+
+          if ($diff -match "<Version>") {
+            $version = (Select-String -Path tools/UglyToad.PdfPig.Package/UglyToad.PdfPig.Package.csproj -Pattern "<Version>(.*)</Version>").Matches.Groups[1].Value
+            echo "version=$version" >> $env:GITHUB_OUTPUT
+            echo "create=true" >> $env:GITHUB_OUTPUT
+          } else {
+            echo "create=false" >> $env:GITHUB_OUTPUT
+          }
+
+      - name: Create tag
+        if: steps.versioncheck.outputs.create == 'true'
+        run: |
+          git config user.name "github-actions"
+          git config user.email "github-actions@github.com"
+
+          git tag "v${{ steps.versioncheck.outputs.version }}"
+          git push origin "v${{ steps.versioncheck.outputs.version }}"