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/build.sh

@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+cd "$(dirname "$0")"
+
+echo "==> Tidying modules..."
+go mod tidy
+
+echo "==> Building docker-tui..."
+mkdir -p build
+go build -trimpath -ldflags='-s -w' -o build/docker-tui .
+
+echo "==> Done: build/docker-tui ($(du -h build/docker-tui | cut -f1))"
+echo "    Run with: ./build/docker-tui"