[meta] Workflow to test windows sign (#6101)

## Description

## Tests

.github/workflows/auth-win-sign.yml

@@ -0,0 +1,99 @@
+name: "Windows build and signing (auth)"
+
+# [Note: Testing release workflows that are triggered by tags]
+#
+# To test this out, push a tag with a pre-release version. The version number
+# should be the version number of the next actual release.
+#
+# > When major, minor, and patch are equal, a pre-release version has lower
+# > precedence than a normal version. Example: 1.0.0-alpha < 1.0.0.
+# > https://semver.org
+#
+# So if the next release we intend to put out is 1.2.3, you can:
+#
+#     git tag auth-v1.2.3-test
+#     git push origin auth-v1.2.3-test
+#
+# We use a suffix like `-test` to indicate that these are test tags, and that
+# they belong to a pre-release.
+#
+# If you need to do multiple tests, add a .x at the end of the tag. e.g.
+# `auth-v1.2.3-test.1`.
+#
+# Once the testing is done, also delete the tag(s) please.
+
+on:
+    workflow_dispatch: # Allow manually running the action
+
+env:
+    FLUTTER_VERSION: "3.24.3"
+
+permissions:
+    contents: write
+
+jobs:
+    build-windows:
+        runs-on: windows-latest
+        environment: "auth-win-build"
+
+        defaults:
+            run:
+                working-directory: auth
+
+        steps:
+            - name: Checkout code and submodules
+              uses: actions/checkout@v4
+              with:
+                  submodules: recursive
+
+            - name: Install Flutter ${{ env.FLUTTER_VERSION  }}
+              uses: subosito/flutter-action@v2
+              with:
+                  channel: "stable"
+                  flutter-version: ${{ env.FLUTTER_VERSION  }}
+                  cache: true
+
+            - name: Create artifacts directory
+              run: mkdir artifacts
+
+            - name: Build Windows installer
+              run: |
+                  flutter config --enable-windows-desktop
+                  # dart pub global activate flutter_distributor
+                  dart pub global activate --source git https://github.com/ente-io/flutter_distributor_fork --git-ref develop --git-path packages/flutter_distributor
+                  make innoinstall
+                  flutter_distributor package --platform=windows --targets=exe --skip-clean
+                  mv dist/**/*-windows-setup.exe artifacts/ente-${{ github.ref_name }}-installer.exe
+
+            - name: Retain Windows EXE and DLLs
+              run: cp -r build/windows/x64/runner/Release ente-${{ github.ref_name }}-windows
+
+            - name: Sign files with Trusted Signing
+              uses: azure/trusted-signing-action@v0
+              with:
+                azure-tenant-id: ${{ secrets.AZURE_TENANT_ID }}
+                azure-client-id: ${{ secrets.AZURE_CLIENT_ID }}
+                azure-client-secret: ${{ secrets.AZURE_CLIENT_SECRET }}
+                endpoint: ${{ secrets.AZURE_ENDPOINT }}
+                trusted-signing-account-name: v${{ secrets.AZURE_CODE_SIGNING_NAME }}
+                certificate-profile-name: ${{ secrets.AZURE_CERT_PROFILE_NAME }}
+                files: |
+                      auth/artifacts/ente-${{ github.ref_name }}-installer.exe
+                      auth/ente-${{ github.ref_name }}-windows/auth.exe
+                file-digest: SHA256
+                timestamp-rfc3161: http://timestamp.acs.microsoft.com
+                timestamp-digest: SHA256  
+
+            - name: Zip Windows EXE and DLLs
+              run: tar.exe -a -c -f artifacts/ente-${{ github.ref_name }}-windows.zip ente-${{ github.ref_name }}-windows
+
+            - name: Generate checksums
+              run: sha256sum artifacts/ente-* > artifacts/sha256sum-windows
+
+            - name: Create a draft GitHub release
+              uses: ncipollo/release-action@v1
+              with:
+                  artifacts: "auth/artifacts/*"
+                  draft: true
+                  allowUpdates: true
+                  updateOnlyUnreleased: true