add github action

.github/workflows/make_test_ebook.yaml

@@ -0,0 +1,21 @@
+name: Pull Request
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+  workflow_dispatch:
+
+jobs:
+
+  testing:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - uses: actions/setup-python@v4
+      with:
+        python-version: '3.9'
+        cache: 'pip' # caching pip dependencies
+    - run: pip install -r requirements.txt
+    - run: python3 make.py --book_name test_books/animal_farm.epub --no_limit --test
+