feat: Add São Paulo crime data examples

- Add police district (DISTPOL) shapefiles and crime statistics
- Include historical crime data from 2000-2020 (CSV and DBF formats)
- Add demo_sp_2.ipynb notebook with real crime data analysis
- Add .gitignore to exclude system files (.DS_Store, __pycache__, etc)

Examples now include both synthetic and real-world crime analysis for São Paulo

Author: lucasazv99

.gitignore

@@ -0,0 +1,56 @@
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+*.so
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+
+# Testing
+.pytest_cache/
+.coverage
+htmlcov/
+.tox/
+.hypothesis/
+
+# IDEs
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# OS
+.DS_Store
+.DS_Store?
+._*
+.Spotlight-V100
+.Trashes
+ehthumbs.db
+Thumbs.db
+
+# Jupyter
+.ipynb_checkpoints/
+*.ipynb_checkpoints
+
+# Logs
+*.log
+
+# Temporary files
+*.tmp
+*.bak
+

examples/DISTPOL2021_MSP_CEM_V1_2/DADOS_DISTPOL_2000_2005_MSP_CEM_V1.dbf

@@ -0,0 +1 @@
+GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137,298.25722356]],PRIMEM["Greenwich",0],UNIT["Degree",0.0174532925199433]]