add workflow

.github/workflows/build.yml

@@ -0,0 +1,66 @@
+name: Build APK and Linux
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build-linux:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: '3.13'
+
+      - name: Install Poetry and dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install poetry
+          poetry config virtualenvs.create false
+          poetry install --no-dev
+
+      - name: Build Linux package
+        run: poetry run flet build linux
+
+      - name: Upload Linux artifact
+        uses: actions/upload-artifact@v3
+        with:
+          name: ren-browser-linux
+          path: build/linux
+
+  build-android:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: '3.13'
+
+      - name: Install Poetry and dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install poetry
+          poetry config virtualenvs.create false
+          poetry install --no-dev
+
+      - name: Build Android APK
+        run: poetry run flet build android
+
+      - name: Upload APK artifact
+        uses: actions/upload-artifact@v3
+        with:
+          name: ren-browser-apk
+          path: build/android/output