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/finance/vwap.md

@@ -0,0 +1,35 @@
+---
+name: vwap
+kind: function
+lang: py
+domain: finance
+version: "1.0.0"
+purity: pure
+signature: "def vwap(prices: list, volumes: list) -> float"
+description: "Calcula el Volume-Weighted Average Price (VWAP)."
+tags: [finance, vwap, volume, indicator, python]
+uses_functions: []
+uses_types: []
+returns: []
+returns_optional: false
+error_type: ""
+imports: []
+tested: false
+tests: []
+test_file_path: ""
+file_path: "python/functions/finance/finance.py"
+---
+
+## Ejemplo
+
+```python
+prices = [100.0, 101.0, 102.0, 101.5]
+volumes = [1000, 1500, 1200, 800]
+result = vwap(prices, volumes)
+# 101.0888...
+```
+
+## Notas
+
+Formula: sum(price_i * volume_i) / sum(volume_i).
+Retorna 0.0 si las listas estan vacias, tienen distinto tamanio, o el volumen total es cero.