ENH: Add pixi CI configuration

.github/workflows/pixi-test.yml

@@ -0,0 +1,22 @@
+name: Pixi Test
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      max-parallel: 5
+      matrix:
+        os: [ubuntu-22.04, windows-2022, macos-12, macos-14]
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: prefix-dev/[email protected]
+        with:
+          cache: false
+          cache-write: false
+
+      - name: Run tests
+        run: pixi run test