Add dispatchable E2E Maestro workflow

.github/workflows/e2e-ios-templateapp.yml

@@ -18,7 +18,7 @@ jobs:
   # Building the app needs Xcode, so it stays on a macOS runner. The E2E run
   # itself drives a remote simulator via sim-remote, so it runs on Linux.
   build:
-    runs-on: macos-26-large
+    runs-on: macos-26
     strategy:
       fail-fast: false
       matrix:

.github/workflows/e2e-maestro.yml

@@ -0,0 +1,82 @@
+name: E2E Maestro
+
+# A trimmed-down test-all: builds only what the two iOS Maestro E2E flows
+# need (Apple prebuilds, the RNTester app, the npm package) and runs them.
+# No Android, SPM, unit-test, or lint jobs.
+
+on:
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  prebuild_apple_dependencies:
+    uses: ./.github/workflows/prebuild-ios-dependencies.yml
+    secrets: inherit
+
+  prebuild_react_native_core:
+    needs: [prebuild_apple_dependencies]
+    uses: ./.github/workflows/prebuild-ios-core.yml
+    with:
+      use-hermes-prebuilt: ${{ !endsWith(github.ref_name, '-stable') }}
+    secrets: inherit
+
+  # Builds RNTester and uploads the RNTesterApp-NewArch-<flavor> artifacts
+  # consumed by e2e-ios-rntester.yml (run-unit-tests defaults to false).
+  build_rntester_app:
+    runs-on: macos-15
+    needs: [prebuild_apple_dependencies, prebuild_react_native_core]
+    strategy:
+      fail-fast: false
+      matrix:
+        flavor: [Debug, Release]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+      - name: Build RNTester
+        uses: ./.github/actions/test-ios-rntester
+        with:
+          use-prebuilds: true
+          flavor: ${{ matrix.flavor }}
+
+  # Builds the react-native .tgz (dry-run) consumed by e2e-ios-templateapp.yml.
+  build_npm_package:
+    runs-on: ubuntu-latest
+    needs: [prebuild_apple_dependencies, prebuild_react_native_core]
+    container:
+      image: reactnativecommunity/react-native-android:latest
+      env:
+        TERM: 'dumb'
+        # Set the encoding to resolve a known character encoding issue with decompressing tar.gz files in containers
+        # via Gradle: https://github.com/gradle/gradle/issues/23391#issuecomment-1878979127
+        LC_ALL: C.UTF8
+        GRADLE_OPTS: '-Dorg.gradle.daemon=false'
+        REACT_NATIVE_DOWNLOADS_DIR: /opt/react-native-downloads
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+      - name: Build NPM Package
+        uses: ./.github/actions/build-npm-package
+        with:
+          release-type: dry-run
+          gradle-cache-encryption-key: ${{ secrets.GRADLE_CACHE_ENCRYPTION_KEY }}
+
+  test_e2e_ios_rntester:
+    needs: build_rntester_app
+    uses: ./.github/workflows/e2e-ios-rntester.yml
+    with:
+      fail-on-error: true
+    secrets: inherit
+
+  test_e2e_ios_templateapp:
+    needs:
+      [
+        build_npm_package,
+        prebuild_apple_dependencies,
+        prebuild_react_native_core,
+      ]
+    uses: ./.github/workflows/e2e-ios-templateapp.yml
+    with:
+      fail-on-error: true
+    secrets: inherit