Add GitHub Action to run geocode.py and commit results

Add a GitHub Actions workflow to run `geocode.py` manually and commit the results to the repository.

* **Add requirements.txt**: List dependencies required for `geocode.py`.
* **Add .github/workflows/geocode.yml**:
  - Check out the repository using `actions/checkout@v2`.
  - Set up Python 3.x using `actions/setup-python@v2`.
  - Install dependencies from `requirements.txt`.
  - Run `geocode.py`.
  - Commit and push the results to the repository.

---

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Author: neon-ninja

.github/workflows/geocode.yml

@@ -0,0 +1,32 @@
+name: Run geocode.py
+
+on:
+  workflow_dispatch:
+
+jobs:
+  geocode:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Check out repository
+      uses: actions/checkout@v2
+
+    - name: Set up Python
+      uses: actions/setup-python@v2
+      with:
+        python-version: '3.x'
+
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install -r requirements.txt
+
+    - name: Run geocode.py
+      run: python geocode.py
+
+    - name: Commit results
+      run: |
+        git config --global user.name 'github-actions[bot]'
+        git config --global user.email 'github-actions[bot]@users.noreply.github.com'
+        git commit -am 'Geocode'
+        git push

requirements.txt

@@ -0,0 +1,7 @@
+pandas
+geopandas
+requests
+requests_cache
+shapely
+timezonefinder
+tqdm