Add CI checks

.github/dependabot.yml

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+version: 2
+updates:
+  - package-ecosystem: pip
+    directory: /
+    schedule:
+      interval: monthly
+  - package-ecosystem: github-actions
+    directory: /
+    schedule:
+      interval: monthly

.github/workflows/test.yml

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+name: Test cofactr-cogs
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: ["**"]
+
+jobs:
+  test:
+    name: Test cofactr-cogs
+    runs-on: ubuntu-22.04
+    strategy:
+      matrix:
+        python-version: ["3.10", "3.11", "3.12"]
+
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r requirements.txt
+          pip install -r requirements-test.txt
+      - name: Check formatting
+        run: ruff format --diff .
+      - name: Lint with ruff
+        run: ruff check --target-version=py310 .
+      - name: Check types
+        run: mypy .

requirements-test.txt

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+mypy==1.10.0
+ruff==0.4.4
+types-requests==2.31.0.20240406

requirements.txt

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+requests==2.31.0