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/cybersecurity/normalize_url.md

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+---
+name: normalize_url
+kind: function
+lang: py
+domain: cybersecurity
+version: "1.0.0"
+purity: pure
+signature: "def normalize_url(raw_url: str) -> str"
+description: "Normaliza una URL: lowercase del host, elimina fragmentos, ordena parametros. Util para deduplicacion de IoCs."
+tags: [url, normalize, ioc, dedup, python]
+uses_functions: []
+uses_types: []
+returns: []
+returns_optional: false
+error_type: ""
+imports: [urllib.parse]
+tested: false
+tests: []
+test_file_path: ""
+file_path: "python/functions/cybersecurity/cybersecurity.py"
+---
+
+## Ejemplo
+
+```python
+normalize_url("HTTPS://Example.COM/path?b=2&a=1#frag")
+# "https://example.com/path?a=1&b=2"
+
+normalize_url("http://test.org/path/")
+# "http://test.org/path"
+```
+
+## Notas
+
+Operaciones de normalizacion: lowercase de scheme y host, eliminacion de trailing slash (excepto root), ordenamiento alfabetico de query parameters, eliminacion de fragmentos. Usa urllib.parse de stdlib.