ci: add GitHub Actions workflow for automated testing

- Add .github/workflows/ci.yml to trigger on push/PR to main

- Configure workflow to checkout code and install Python 3.9

- Install CPU-only version of PyTorch to optimize CI run time

- Add formatting check using black --check

- Add unit test execution using pytest

Author: BenjaminIsaac0111

.github/workflows/ci.yml

@@ -0,0 +1,35 @@
+name: CI
+
+on:
+  push:
+    branches: [ "main", "master" ]
+  pull_request:
+    branches: [ "main", "master" ]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Check out repository
+      uses: actions/checkout@v4
+
+    - name: Set up Python 3.9
+      uses: actions/setup-python@v5
+      with:
+        python-version: "3.9"
+        cache: "pip"
+
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install torch torchvision --index-url https://download.pytorch.org/whl/cpu
+        pip install -e .[dev]
+
+    - name: Check formatting with black
+      run: |
+        black --check .
+
+    - name: Test with pytest
+      run: |
+        pytest tests/