Agregar modulo de instalacion de Docker

- modules/docker.sh: instala Docker Engine (docker-ce, docker-ce-cli,
  containerd.io, docker-buildx-plugin, docker-compose-plugin) via repositorio
  apt oficial de Docker; agrega el usuario al grupo docker para operar sin sudo;
  instala Lazydocker en ~/.local/bin/ desde la ultima release de GitHub
- config/modules: docker corre despues de registry y antes de thunderbird
- CLAUDE.md y README.md: documentan el nuevo modulo en la tabla de orden de ejecucion

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

CLAUDE.md

@@ -37,6 +37,7 @@ Current modules in execution order:
 - `bootstrap` — installs `yq` and `age` (required by all other modules)
 - `ssh` — decrypts `secrets/sshKeys.tar.gz.age` with `age` and installs keys into `~/.ssh`
 - `registry` — reads `config/registry.yaml` and applies every entry (packages, dotfiles, services, drivers, audio)
+- `docker` — installs Docker Engine, Docker Compose plugin, adds user to `docker` group, and installs Lazydocker
 - `thunderbird` — installs Thunderbird (snap) and restores profile from `secrets/thunderbirdProfile.zip`
 - `claudeCode` — configures the Anthropic apt repository and installs `claude-code`
 - `easyEffects` — restores EasyEffects config and presets from `secrets/easyEffectsConfig.zip`