feat: add Windows installer and update release artifacts

.github/release_message.md

@@ -80,6 +80,12 @@
             <img
               src="https://img.shields.io/badge/Windows-Portable-0C88D8.svg?logo=github" />
           </a>
+          <br />
+          <a
+            href="https://github.com/UnboundTechCo/defyxVPN/releases/download/RELEASE_TAG/DefyxVPN-Windows-Installer-x64.msix">
+            <img
+              src="https://img.shields.io/badge/Windows-Installer-0C88D8.svg?logo=windows" />
+          </a>
         </td>
         <td valign="top">10 or later</td>
       </tr>

.github/workflows/windows.yml

@@ -69,12 +69,43 @@ jobs:
         shell: pwsh
         run: |
           $source = "build/windows/x64/runner/Release"
-          $zipPath = "build/windows/x64/runner/Release/DefyxVPN-Windows-Portable-x64.zip"
+          $zipPath = "build/windows/DefyxVPN-Windows-Portable-x64.zip"
           if (Test-Path $zipPath) { Remove-Item $zipPath }
           Compress-Archive -Path "$source\*" -DestinationPath $zipPath
 
-      - name: Upload Windows Release ZIP
+      - name: Build Windows Installer
+        shell: pwsh
+        run: |
+          $pubspecPath = "pubspec.yaml"
+          $pubspec = Get-Content $pubspecPath -Raw
+          $versionMatch = [regex]::Match($pubspec, '(?m)^version:\s*(\d+\.\d+\.\d+)\+(\d+)\s*$')
+          if (-not $versionMatch.Success) {
+            throw "Could not find a Flutter version in pubspec.yaml"
+          }
+          $msixVersion = "$($versionMatch.Groups[1].Value).$($versionMatch.Groups[2].Value)"
+          $pubspec = [regex]::Replace(
+            $pubspec,
+            '(?m)^  msix_version:\s*.*$',
+            "  msix_version: $msixVersion"
+          )
+          Set-Content -Path $pubspecPath -Value $pubspec -NoNewline
+
+          dart run msix:create
+
+          $installerDirectory = "build/windows/installer"
+          New-Item -ItemType Directory -Force -Path $installerDirectory | Out-Null
+          $msix = Get-ChildItem -Path "build/windows" -Filter "*.msix" -Recurse |
+            Where-Object { $_.FullName -notlike "*\installer\*" } |
+            Select-Object -First 1
+          if ($null -eq $msix) {
+            throw "MSIX package was not generated"
+          }
+          Move-Item $msix.FullName "$installerDirectory\DefyxVPN-Windows-Installer-x64.msix" -Force
+
+      - name: Upload Windows Release Artifacts
         uses: actions/upload-artifact@v4
         with:
           name: windows-release
-          path: build/windows/x64/runner/Release/DefyxVPN-Windows-Portable-x64.zip
+          path: |
+            build/windows/DefyxVPN-Windows-Portable-x64.zip
+            build/windows/installer/DefyxVPN-Windows-Installer-x64.msix