ci(gitlab): pipeline GitLab Pages + URLs do repo para o GitLab UFPE

- .gitlab-ci.yml: job `pages` roda build:pages e publica o site combinado
  (UFPE na raiz + submarcas STI/RU + /tokens + /plugin) no master; job
  `build` valida em branches/MRs.
- generate-build-info.js (3 apps): REPO_URL -> gitlab.ufpe.br, com paths
  no formato GitLab (/-/commit/, /-/releases/).
- main.js (3 apps): footer passa a indicar "Ver no GitLab UFPE".

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