feat: link commits, branches and pull requests to tickets

A project can turn on a webhook for GitHub, Gitea or GitLab. Pushes and
pull or merge requests that name a ticket key show on that ticket under
Desarrollo, with the state of each pull request; the secret is shown and
rotated from the project settings.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

libs/api/tracker/application/src/lib/ports/index.ts

@@ -23,3 +23,4 @@ export * from './notification-mailer';
 export * from './saved-filters.repository';
 export * from './find-sprints.repository';
 export * from './upsert-materialized-sprint.repository';
+export * from './git-integrations.repository';