feat: funciones Python para core, cybersecurity, datascience y finance

Agrega funciones Python reutilizables organizadas por dominio:
- core: composicion funcional (pipe, compose, map, filter, reduce, etc.)
- cybersecurity: analisis de amenazas y puertos
- datascience: estadisticas y deteccion de outliers
- finance: indicadores tecnicos y analisis financiero

python/functions/datascience/rolling_window.md

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+---
+name: rolling_window
+kind: function
+lang: py
+domain: datascience
+version: "1.0.0"
+purity: pure
+signature: "def rolling_window(xs: list, size: int) -> list"
+description: "Genera ventanas deslizantes de tamanio fijo sobre una lista."
+tags: [windowing, timeseries, python]
+uses_functions: []
+uses_types: []
+returns: []
+returns_optional: false
+error_type: ""
+imports: []
+tested: false
+tests: []
+test_file_path: ""
+file_path: "python/functions/datascience/datascience.py"
+---
+
+## Ejemplo
+
+```python
+rolling_window([1, 2, 3, 4, 5], 3)
+# [[1, 2, 3], [2, 3, 4], [3, 4, 5]]
+```
+
+## Notas
+
+Retorna lista vacia si size <= 0 o size > len(xs). Util para calcular medias moviles u otras metricas sobre ventanas.