Build windows app

.github/workflows/build_windows_app.yml

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+name: Build Windows app
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  build:
+    runs-on: windows-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Set up Flutter
+        uses: subosito/flutter-action@v2.10.0
+        with:
+          flutter-version: "3.13.1"  # Set flutter version here
+
+      - name: Build Windows app
+        run: flutter build windows --release
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v2
+        with:
+          name: aferchat
+          path: build/windows/runner/Release