Add two engineering skills for implementing tracker tickets end to end:
- dev-workflow: selects workflow:ready-for-agent tickets, runs them in
isolated worktrees, opens one PR/MR per ticket, reviews, merges, and
cleans up.
- forge-cli: detects the forge from origin and wraps gh, glab, and tea
for Gitea/Forgejo, GitHub, and GitLab.
Docs cover install, prerequisites, ticket labels, and per-forge CLI usage.
