Set up CI with GitHub Actions

.github/workflows/lint.yml

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+name: Lint
+
+on: [push, pull_request]
+
+concurrency:
+  group: ${{ github.ref }}-${{ github.workflow }}
+  cancel-in-progress: true
+
+jobs:
+
+  lint:
+    name: Check for lint and format code to a standard style
+    if:
+      github.event_name == 'push' || github.event.pull_request.head.repo.full_name != github.repository
+
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: conda-incubator/setup-miniconda@v3
+        with:
+          miniforge-version: latest
+          python-version: 3.12
+          auto-activate-base: false
+
+      - name: Install black and flake8
+        run: pip install black flake8
+
+      - name: Format code
+        run: |
+          flake8 .
+          black .

.github/workflows/test.yml

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+name: Test
+
+on: [push, pull_request]
+
+concurrency:
+  group: ${{ github.ref }}-${{ github.workflow }}
+  cancel-in-progress: true
+
+jobs:
+
+  test:
+    name: Run unit tests
+    if:
+      github.event_name == 'push' || github.event.pull_request.head.repo.full_name != github.repository
+
+    runs-on: ${{ matrix.os }}
+
+    defaults:
+      run:
+        shell: bash -l {0}
+
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+        python-version: ["3.10", "3.11", "3.12", "3.13"]
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: conda-incubator/setup-miniconda@v3
+        with:
+          miniforge-version: latest
+          activate-environment: gridmet_bmi
+          environment-file: environment.yml
+          python-version: ${{ matrix.python-version }}
+
+      - name: Show conda installation info
+        run: |
+          conda info
+          conda list
+
+      - name: Build and install package
+        run: |
+          make install
+
+      - name: Run unit tests
+        run: |
+          make test
+
+      - name: Test BMI
+        if: ${{ matrix.python-version == '3.12' }}
+        run: |
+          make test-bmi
+
+      - name: Run examples
+        working-directory: ${{ github.workspace }}/examples
+        run: |
+          python debug.py