chore: import upstream snapshot with attribution

.github/workflows/build.yml

@@ -0,0 +1,100 @@
+name: Build
+
+on: [push, pull_request]
+
+permissions:
+  contents: read
+
+jobs:
+  build_wheels:
+    name: Build and test on ${{ matrix.os }}${{ matrix.numpy-version && format(' (numpy {0})', matrix.numpy-version) || '' }} for ${{ matrix.arch }}
+    runs-on: ${{ matrix.runs-on || matrix.os }}
+    permissions:
+      contents: write
+    env:
+      CIBW_ARCHS_LINUX: ${{ matrix.arch }}
+      CIBW_ARCHS_MACOS: "x86_64 arm64"
+      CIBW_ENABLE: cpython-freethreading
+
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          # Linux x86_64 (build wheels)
+          - os: ubuntu-latest
+            arch: x86_64
+            artifact_name: "linux-x86_64"
+            python-version: "3.x"
+
+          # Linux x86_64 (test numpy 1.26)
+          - os: ubuntu-latest
+            arch: x86_64
+            artifact_name: "linux-x86_64_numpy1_26"
+            python-version: "3.12"
+            numpy-version: "1.26"
+
+          # Linux ARM64 (build wheels)
+          - os: ubuntu-24.04-arm
+            arch: aarch64
+            artifact_name: "linux-aarch64"
+            python-version: "3.x"
+
+          # Windows (build wheels)
+          - os: windows-latest
+            arch: x86_64
+            artifact_name: "windows-x86_64"
+            python-version: "3.x"
+
+          # Windows ARM64 (build wheels)
+          - os: windows-11-arm
+            arch: aarch64
+            artifact_name: "windows-arm64"
+            python-version: "3.x"
+
+          # macOS (build wheels)
+          - os: macos-latest
+            arch: x86_64
+            artifact_name: "macos-universal2"
+            python-version: "3.x"
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - uses: actions/setup-python@v3
+        name: Install Python
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      # Run tests with specific numpy version
+      - name: Install and test with specific numpy version
+        if: matrix.numpy-version
+        run: |
+          pip install "numpy==${{ matrix.numpy-version }}.*"
+          pip install -e .
+          pip install pytest
+          python -m pytest
+
+      # Build wheels only if:
+      #   - No numpy version is specified
+      #   - Python version is "3.x"
+      - name: Build wheels
+        if: ${{ !matrix.numpy-version }}
+        uses: pypa/cibuildwheel@v3.1.3
+
+      - name: Make sdist
+        if: ${{ matrix.os == 'windows-latest' && !matrix.numpy-version }}
+        run: |
+          python -m pip install build
+          python -m build --sdist --outdir wheelhouse .
+
+      - uses: actions/upload-artifact@v4
+        if: ${{ !matrix.numpy-version }}
+        with:
+          name: ${{ matrix.artifact_name }}
+          path: ./wheelhouse/*
+
+      - name: Upload to GitHub Release
+        if: startsWith(github.ref, 'refs/tags/') && !matrix.numpy-version
+        uses: softprops/action-gh-release@v1
+        with:
+          files: wheelhouse/*

.github/workflows/close-stale-issues.yml

@@ -0,0 +1,13 @@
+name: 'Close stale issues and PRs'
+on:
+  schedule:
+    - cron: '30 1 * * *'
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/stale@v9
+        with:
+          stale-issue-message: 'Message to comment on stale issues. If none provided, will not mark issues stale'
+          stale-pr-message: 'Message to comment on stale PRs. If none provided, will not mark PRs stale'