chore: import upstream snapshot with attribution

.github/actions/run-tests/action.yml

@@ -0,0 +1,41 @@
+name: 'Run Tests'
+description: 'Runs the preflight checks and integration tests.'
+
+inputs:
+  gemini_api_key:
+    description: 'The API key for running integration tests.'
+    required: true
+  working-directory:
+    description: 'The working directory to run the tests in.'
+    required: false
+    default: '.'
+
+runs:
+  using: 'composite'
+  steps:
+    - name: 'Install system dependencies'
+      if: "runner.os == 'Linux'"
+      run: |
+        sudo apt-get update -qq && sudo DEBIAN_FRONTEND=noninteractive apt-get install -y -qq bubblewrap
+        # Ubuntu 24.04+ requires this to allow bwrap to function in CI
+        sudo sysctl -w kernel.apparmor_restrict_unprivileged_userns=0 || true
+      shell: 'bash'
+    - name: 'Run Tests'
+      env:
+        GEMINI_API_KEY: '${{ inputs.gemini_api_key }}'
+        GEMINI_CLI_TRUST_WORKSPACE: true
+      working-directory: '${{ inputs.working-directory }}'
+      run: |-
+        echo "::group::Build"
+        npm run build
+        echo "::endgroup::"
+        echo "::group::Unit Tests"
+        npm run test:ci
+        echo "::endgroup::"
+        echo "::group::Integration Tests (no sandbox)"
+        npm run test:integration:sandbox:none
+        echo "::endgroup::"
+        echo "::group::Integration Tests (docker sandbox)"
+        npm run test:integration:sandbox:docker
+        echo "::endgroup::"
+      shell: 'bash'