feat: Docker TUI — aplicacion Bubble Tea para gestionar Docker

TUI fullscreen con 5 vistas: Containers (start/stop/restart/logs),
Images (list/remove), Volumes (list/remove), Networks (list/remove),
Compose (up/down/logs). Usa DevFactory (tui, shell, core). Navegacion
por tabs, filtrado en containers/images, scroll en logs.
Incluye operations.db con entities y relations del proyecto.

fn_operations/docker_tui/config/config.go

@@ -0,0 +1,15 @@
+package config
+
+// Config holds Docker TUI configuration.
+type Config struct {
+	ComposeFile     string
+	RefreshInterval int // seconds, 0 = manual
+}
+
+// Default returns sensible defaults.
+func Default() Config {
+	return Config{
+		ComposeFile:     "docker-compose.yml",
+		RefreshInterval: 0,
+	}
+}