Verify output format templates in CI

.github/workflows/ci.yml

@@ -142,10 +142,27 @@ jobs:
         name: html-coverage-report-project
         path: htmlcov
 
+  verify-templates:
+    name: Verify Templates
+    needs: unit-tests
+    # !!!!! TODO:PR: use real repo !!!!!
+    # uses: beeware/.github/.github/workflows/app-create-verify.yml@main
+    uses: rmartin16/.github-beeware/.github/workflows/app-create-verify.yml@create-new-project
+    with:
+      runner-os: ${{ matrix.runner-os }}
+      framework: ${{ matrix.framework }}
+    strategy:
+      fail-fast: false
+      matrix:
+        framework: [ "toga", "pyside6", "ppb", "pygame" ]
+        runner-os: [ "macos-latest", "ubuntu-22.04", "windows-latest" ]
+
   verify-apps:
     name: Build app
     needs: unit-tests
-    uses: beeware/.github/.github/workflows/app-build-verify.yml@main
+    # !!!!! TODO:PR: use real repo !!!!!
+    # uses: beeware/.github/.github/workflows/app-build-verify.yml@main
+    uses: rmartin16/.github-beeware/.github/workflows/app-build-verify.yml@create-new-project
     with:
       # This *must* be the version of Python that is the system Python on the
       # Ubuntu version used to run Linux tests. We use a fixed ubuntu-22.04