Add Codeowners, basic CI workflow

Author: jiuguangw

.github/CODEOWNERS

@@ -0,0 +1,5 @@
+# See https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners#codeowners-syntax
+
+# Global owners
+#
+@xzhu0428

.github/workflows/test.yml

@@ -0,0 +1,43 @@
+# Copyright (c) 2025 Boston Dynamics AI Institute LLC. All rights reserved.
+
+name: Build and Test
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build:
+    runs-on: ubuntu-22.04
+    permissions:
+      contents: read
+      packages: write
+      id-token: write
+    strategy:
+      fail-fast: false
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v5
+
+    - name: Set up Python
+      uses: actions/setup-python@v6
+      with:
+        python-version: 3.10
+
+    - name: Install pixi
+      uses: prefix-dev/setup-pixi@v0.9.0
+      with:
+      pixi-version: v0.55.0
+      cache: true
+      auth-host: prefix.dev
+
+    - name: Build
+      run: |
+        pixi install
+        pixi install

.gitignore

@@ -213,3 +213,5 @@ __marimo__/
 # logs
 logs/
 outputs/
+
+.DS_Store