Add complete GIS ETL project skeleton for SRTM data processing

- Python modules for geo boundary processing and SRTM downloads
- Docker containerization with GDAL support
- Development environment with devcontainer
- Orchestration scripts for local and containerized execution
- Support for KMZ/GeoJSON boundary files and NASA SRTM data

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

requirements.txt

@@ -0,0 +1,10 @@
+requests>=2.31.0
+geopandas>=0.14.0
+shapely>=2.0.0
+fiona>=1.9.0
+rasterio>=1.3.0
+pyproj>=3.6.0
+numpy>=1.24.0
+pandas>=2.0.0
+GDAL>=3.6.0
+click>=8.1.0