feat: docker_create_network y docker_remove_network en infra

Funciones para crear y eliminar redes Docker. DockerCreateNetwork
usa bridge como driver por defecto. Necesarias para pipelines que
orquestan múltiples contenedores en red compartida.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

functions/infra/docker_remove_network.md

@@ -0,0 +1,30 @@
+---
+name: docker_remove_network
+kind: function
+lang: go
+domain: infra
+version: "1.0.0"
+purity: impure
+signature: "func DockerRemoveNetwork(nameOrID string) error"
+description: "Elimina una red Docker por nombre o ID."
+tags: [docker, network, remove, infra]
+uses_functions: []
+uses_types: []
+returns: []
+returns_optional: false
+error_type: "error_go_core"
+imports: [fmt, os/exec, strings]
+tested: false
+tests: []
+test_file_path: ""
+file_path: "functions/infra/docker_remove_network.go"
+---
+
+## Ejemplo
+
+```go
+err := DockerRemoveNetwork("my-app-net")
+if err != nil {
+    log.Fatal(err)
+}
+```