test: add nightly shorebird_cli e2e installation test (#379)

.github/workflows/nightly_e2e.yaml

@@ -0,0 +1,32 @@
+name: Nighty E2E
+
+on:
+  schedule:
+    # At the end of every day
+    - cron: "0 0 * * *"
+
+jobs:
+  verify_cli_installation:
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [macos-latest, windows-latest, ubuntu-latest]
+
+    defaults:
+      run:
+        shell: bash
+
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - name: 📚 Git Checkout
+        uses: actions/checkout@v3
+
+      - name: 🐦 Verify Shorebird Installation (${{ matrix.os }})
+        run: |
+          if [[ $(./bin/shorebird --version) =~ "Shorebird Engine • revision" ]]; then          
+            echo '✅ Shorebird CLI is installed!'
+          else
+            echo '❌ Shorebird CLI is not installed.'
+          exit 1
+          fi

README.md

@@ -3,6 +3,7 @@
 [![Discord](https://dcbadge.vercel.app/api/server/9hKJcWGcaB)](https://discord.gg/9hKJcWGcaB)
 
 [![ci](https://github.com/shorebirdtech/shorebird/actions/workflows/main.yaml/badge.svg)](https://github.com/shorebirdtech/shorebird/actions/workflows/main.yaml)
+[![Nighty E2E](https://github.com/shorebirdtech/shorebird/actions/workflows/nightly_e2e.yaml/badge.svg)](https://github.com/shorebirdtech/shorebird/actions/workflows/nightly_e2e.yaml)
 [![License: MIT](https://img.shields.io/badge/license-MIT-blue.svg)](./LICENSE-MIT)
 [![License: Apache](https://img.shields.io/badge/license-Apache-orange.svg)](./LICENSE-APACHE)