chore(wp-theme): ambiente de teste WordPress via Docker/OrbStack

.dev/docker-compose.yml: WordPress (php8.3-apache) + MariaDB 11 com o
tema bind-mounted ao vivo e um helper wp-cli. Sobe em localhost:8910:
  docker compose -f packages/wp-theme/.dev/docker-compose.yml up -d db wordpress

Testado no OrbStack: tema ativa, 6 templates / 5 patterns / 1 variação,
front-end renderiza os patterns (inclusive o brasão extenso via
get_theme_file_uri) sem erros de PHP/DB.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>