add github files

.github/actions/setup/action.yml

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+name: Setup
+
+inputs:
+  python-version:
+    required: false
+    default: '3.8'
+  torch-version:
+    required: false
+    default: '2.2.0'
+  cuda-version:
+    required: false
+    default: cpu
+
+runs:
+  using: composite
+
+  steps:
+    - name: Set up Python ${{ inputs.python-version }}
+      uses: actions/[email protected]
+      with:
+        python-version: ${{ inputs.python-version }}
+        check-latest: true
+        cache: pip
+        cache-dependency-path: |
+          pyproject.toml
+
+    - name: Install PyTorch ${{ inputs.torch-version }}+${{ inputs.cuda-version }}
+      if: ${{ inputs.torch-version != 'nightly' }}
+      run: |
+        pip install torch==${{ inputs.torch-version }} --extra-index-url https://download.pytorch.org/whl/${{ inputs.cuda-version }}
+        python -c "import torch; print('PyTorch:', torch.__version__)"
+        python -c "import torch; print('CUDA:', torch.version.cuda)"
+      shell: bash
+
+    - name: Install PyTorch ${{ inputs.torch-version }}+${{ inputs.cuda-version }}
+      if: ${{ inputs.torch-version == 'nightly' }}
+      run: |
+        pip install --pre torch --extra-index-url https://download.pytorch.org/whl/nightly/${{ inputs.cuda-version }}
+        python -c "import torch; print('PyTorch:', torch.__version__)"
+        python -c "import torch; print('CUDA:', torch.version.cuda)"
+      shell: bash

.github/workflows/linting.yml

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+name: Linting
+
+on:  # yamllint disable-line rule:truthy
+  push:
+    branches:
+      - master
+  pull_request:
+
+jobs:
+  mypy:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: 3.8
+      - name: Install dependencies
+        run: |
+          pip install -e '.[full,test]' -f https://download.pytorch.org/whl/cpu
+      - name: Check type hints
+        run: mypy

.github/workflows/testing.yml

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+name: Testing PyTorch 2.2
+
+on:  # yamllint disable-line rule:truthy
+  push:
+    branches:
+      - master
+  pull_request:
+
+jobs:
+
+  pytest:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 40
+
+      # Skip workflow if only certain files have been changed.
+      - name: Get changed files
+        id: changed-files-specific
+        uses: tj-actions/changed-files@v41
+        with:
+          files: |
+            docs/**
+            examples/**
+            README.md
+            CHANGELOG.md
+
+      - name: Setup packages
+        if: steps.changed-files-specific.outputs.only_changed != 'true'
+        uses: ./.github/actions/setup
+
+      - name: Install main package
+        if: steps.changed-files-specific.outputs.only_changed != 'true'
+        run: |
+          pip install -e .[full,test]
+
+      - name: Run tests
+        if: steps.changed-files-specific.outputs.only_changed != 'true'
+        run: |
+          pytest --cov --cov-report=xml
+
+      - name: Upload coverage
+        if: steps.changed-files-specific.outputs.only_changed != 'true'
+        uses: codecov/codecov-action@v2
+        with:
+          fail_ci_if_error: false