build updates: install uv in github pipeline

Author: tcgoetz

.github/workflows/pythonapp.yml

@@ -11,6 +11,8 @@ jobs:
     - uses: actions/checkout@v2
       with:
         submodules: 'true'
+    - name: Install uv
+      uses: astral-sh/setup-uv@v6
     - name: Set up Python 3.13
       uses: actions/setup-python@v2
       with: