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/extract_urls.md

@@ -0,0 +1,35 @@
+---
+name: extract_urls
+kind: function
+lang: py
+domain: cybersecurity
+version: "1.0.0"
+purity: pure
+signature: "def extract_urls(text: str) -> list"
+description: "Extrae todas las URLs (http/https) de un texto. Util para analisis de IoCs y threat intelligence."
+tags: [url, extract, parsing, ioc, python]
+uses_functions: []
+uses_types: []
+returns: []
+returns_optional: false
+error_type: ""
+imports: [re]
+tested: false
+tests: []
+test_file_path: ""
+file_path: "python/functions/cybersecurity/cybersecurity.py"
+---
+
+## Ejemplo
+
+```python
+extract_urls("Visit https://example.com and http://test.org/path?q=1")
+# ["https://example.com", "http://test.org/path?q=1"]
+
+extract_urls("no urls here")
+# []
+```
+
+## Notas
+
+Usa regex para extraer URLs con esquema http/https. No valida que las URLs sean alcanzables. Util para extraer indicadores de compromiso (IoCs) de logs, emails o reportes de threat intelligence.