refactor: mover apps TUI de fn_operations/ a apps/

Separa aplicaciones ejecutables (docker_tui, pipeline_launcher) de la
librería fn_operations. La carpeta apps/ contiene módulos Go independientes,
fn_operations/ queda como librería pura de models/store/operations.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/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,
+	}
+}