feat: 10 funciones infra Docker y 2 tipos — operaciones de contenedores e imagenes

Funciones Docker: list/start/stop/remove containers, list/pull/remove images,
inspect, logs, run. Tipos: ContainerInfo e ImageInfo. Pre-existentes en el
dominio infra, ahora registrados.

functions/infra/docker_list_images.md

@@ -0,0 +1,33 @@
+---
+name: docker_list_images
+kind: function
+lang: go
+domain: infra
+version: "1.0.0"
+purity: impure
+signature: "func DockerListImages() ([]ImageInfo, error)"
+description: "Lista las imágenes Docker disponibles localmente. Parsea la salida JSON de docker images."
+tags: [docker, image, list, infra]
+uses_functions: []
+uses_types: [image_info_go_infra]
+returns: [image_info_go_infra]
+returns_optional: false
+error_type: "error_go_core"
+imports: [encoding/json, fmt, os/exec]
+tested: false
+tests: []
+test_file_path: ""
+file_path: "functions/infra/docker_list_images.go"
+---
+
+## Ejemplo
+
+```go
+images, err := DockerListImages()
+if err != nil {
+    log.Fatal(err)
+}
+for _, img := range images {
+    fmt.Printf("%s:%s (%s)\n", img.Repository, img.Tag, img.Size)
+}
+```