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_create_network.go

@@ -0,0 +1,26 @@
+package infra
+
+import (
+	"fmt"
+	"os/exec"
+	"strings"
+)
+
+// DockerCreateNetwork crea una red Docker con el nombre y driver dados.
+// Si el driver está vacío, usa "bridge" por defecto.
+// Devuelve el ID de la red creada.
+func DockerCreateNetwork(name, driver string) (string, error) {
+	if name == "" {
+		return "", fmt.Errorf("network name required")
+	}
+	if driver == "" {
+		driver = "bridge"
+	}
+
+	out, err := exec.Command("docker", "network", "create", "--driver", driver, name).CombinedOutput()
+	if err != nil {
+		return "", fmt.Errorf("docker network create %s: %s", name, strings.TrimSpace(string(out)))
+	}
+
+	return strings.TrimSpace(string(out)), nil
+}

functions/infra/docker_create_network.md

@@ -0,0 +1,31 @@
+---
+name: docker_create_network
+kind: function
+lang: go
+domain: infra
+version: "1.0.0"
+purity: impure
+signature: "func DockerCreateNetwork(name, driver string) (string, error)"
+description: "Crea una red Docker con el nombre y driver dados. Si driver está vacío usa bridge por defecto. Devuelve el ID de la red creada."
+tags: [docker, network, create, 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_create_network.go"
+---
+
+## Ejemplo
+
+```go
+netID, err := DockerCreateNetwork("my-app-net", "bridge")
+if err != nil {
+    log.Fatal(err)
+}
+fmt.Println("Network ID:", netID)
+```

functions/infra/docker_remove_network.go

@@ -0,0 +1,16 @@
+package infra
+
+import (
+	"fmt"
+	"os/exec"
+	"strings"
+)
+
+// DockerRemoveNetwork elimina una red Docker por nombre o ID.
+func DockerRemoveNetwork(nameOrID string) error {
+	out, err := exec.Command("docker", "network", "rm", nameOrID).CombinedOutput()
+	if err != nil {
+		return fmt.Errorf("docker network rm %s: %s", nameOrID, strings.TrimSpace(string(out)))
+	}
+	return nil
+}

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)
+}
+```