Add Github Actions (#2)

Create flutter-build.yml

.github/workflows/flutter-build.yml

@@ -0,0 +1,25 @@
+name: Flutter Build
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+    runs-on: macos-latest
+    steps:
+      - name: Clone repository
+        uses: actions/checkout@v4
+      - name: Set up Flutter
+        uses: subosito/flutter-action@v2
+        with:
+          flutter-version: 3.19.4
+      - name: Get dependencies
+        run: flutter pub get
+      - name: Build iOS
+        run: flutter build ios --release --no-codesign