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/views/keys.go

@@ -0,0 +1,14 @@
+package views
+
+// Navigation key constants.
+const (
+	KeyQuit = "ctrl+c"
+	KeyEsc  = "esc"
+	KeyBack = "0"
+	KeyTab  = "tab"
+)
+
+// IsBack returns true if the key should trigger back navigation.
+func IsBack(key string) bool {
+	return key == KeyEsc || key == KeyBack
+}