added basic github actions workflows

.github/workflows/push-develop.yml

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+name: Test on develop
+
+on:
+  push:
+    branches:
+      - develop
+
+jobs:
+  test:
+    uses: ./github/workflows/test.yml
+    with:
+      branch: develop

.github/workflows/push-main.yml

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+name: Test and deploy on main
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  test:
+    uses: ./.github/workflows/test.yml
+    with:
+      branch: main

.github/workflows/test.yml

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+name: Test Workflow
+
+on:
+  workflow_call:
+    inputs:
+      branch:
+        required: true
+        type: string
+    secrets:
+      maven_central_username:
+        required: false
+      maven_central_password:
+        required: false
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Build and test using Docker
+        run: |
+          docker build -t flashcard-generator-core .
+          docker run --rm \
+            -v "$(pwd)":/app \
+            flashcard-generator-core