test v2 cache setup-pixi

.gitattributes

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+# SCM syntax highlighting
+pixi.lock linguist-language=YAML linguist-generated=true

.github/workflows/ci.yml

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+name: CI
+on: [push]
+
+# Automatically stop old builds on the same branch/PR
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+permissions:
+  id-token: write
+  contents: read
+
+jobs:
+  unit-tests:
+    name: pytest
+    timeout-minutes: 30
+    strategy:
+      matrix:
+        os:
+          - ubuntu-latest
+          - macos-latest
+          - windows-latest
+          - ubuntu-24.04-arm
+    runs-on: ${{ matrix.os }}
+    steps:
+      - name: Checkout branch
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - name: Set up pixi
+        uses: prefix-dev/setup-pixi@0f64e482e3d251f735019b1bc7fb0413ead75b2c # v0.8.2
+      - name: Install repository
+        shell: bash
+        run: |
+          ls -lah
+          pixi run echo hello

.gitignore

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+# pixi environments
+.pixi
+*.egg-info