Adding an initial workflow file

.github/workflows/python-package.yml

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+name: geosPythonPackages CI 
+on: pull_request
+
+# Cancels in-progress workflows for a PR when updated
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ["3.9", "3.10", "3.11"]
+        package-name: ["geos_ats_package" "geosx_mesh_doctor" "geosx_mesh_tools_package" "geosx_xml_tools_package" "hdf5_wrapper_package" "pygeosx_tools_package" "timehistory_package"]
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v3
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install package
+      working-directory: ./${{ package-name }}
+      run: |
+        python -m pip install --upgrade pip
+        python -m pip install pytest yapf toml
+        cd 
+        python -m pip install .
+    - name: Lint with yapf
+      working-directory: ./${{ package-name }}
+      run: |
+        yapf -r --diff .
+    # - name: Test with pytest
+    #   working-directory: ./${{ package-name }}
+    #   run: |
+    #     pytest

README.md

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+
+Welcome to the GEOS Python Package Repository!
+-----------------------------------------------
+
+This repository contains a set of python packages that are used alongside [GEOS](https://github.com/GEOS-DEV/GEOS).
+They can be installed automatically by running "make geosx_python_tools" in the GEOS build directory, or can be installed manually with pip.
+See the [documentation](https://geosx-geosx.readthedocs-hosted.com/projects/geosx-geospythonpackages/en/latest/) for additional details about the packages and how to use them.
+