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_start_container.md

@@ -0,0 +1,30 @@
+---
+name: docker_start_container
+kind: function
+lang: go
+domain: infra
+version: "1.0.0"
+purity: impure
+signature: "func DockerStartContainer(nameOrID string) error"
+description: "Inicia un contenedor Docker existente que está detenido. Recibe nombre o ID del contenedor."
+tags: [docker, container, start, 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_start_container.go"
+---
+
+## Ejemplo
+
+```go
+err := DockerStartContainer("my-app")
+if err != nil {
+    log.Fatal(err)
+}
+```