ci(project): add tracker auto-add workflow

[ss-o]

Summary

• add a reusable Project Tracker workflow that adds meta:org-tracked issues to Project 28
• add the Project Tracker starter workflow template for other Z-Shell repositories
• document Project 28, the expected built-in auto-add filter, the API visibility limitation, token requirements, and verification steps

Verification

• Confirmed Project 28 exists as z-shell — Org-wide and created test issue test: verify meta org tracked project auto-add #417 with meta:org-tracked; it was not auto-added before this implementation, so the built-in Project workflow is not currently sufficient from the observed behavior.
• ruby -e 'require "yaml"; Dir[".github/workflows/*.yml", "workflow-templates/*.yml", "actions/*/action.yml"].each { |f| YAML.load_file(f); puts "yaml ok #{f}" }'
• ruby -e 'require "json"; Dir["workflow-templates/*.properties.json"].each { |f| JSON.parse(File.read(f)); puts "json ok #{f}" }'
• git diff --check
• trunk check --show-existing --no-progress
• git log -1 --show-signature --format=fuller

Closes #413
Refs #417

[Copilot]

Pull request overview

Adds organization-wide “Project Tracker” automation so issues labeled meta:org-tracked can be auto-added to the z-shell — Org-wide GitHub Project (Project v2 #28), plus starter workflow and runbook documentation to roll the behavior out across Z-Shell repositories.

Changes:

• Introduces a reusable workflow (.github/workflows/project-tracker.yml) to add issues to Project 28 via gh project item-add, and a starter workflow template to call it from other repos.
• Documents the tracker/project identity, the preferred built-in Project auto-add filter, token requirements, and verification steps.
• Updates existing docs/indexes to reference the new runbook and starter workflow.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
workflow-templates/project-tracker.yml	Adds a starter workflow that calls the reusable project-tracker workflow when meta:org-tracked is present.
workflow-templates/project-tracker.properties.json	Registers the starter workflow template metadata for “Actions > New workflow”.
runbooks/triage.md	Links triage guidance to the new project-tracker runbook.
runbooks/project-tracker.md	New runbook documenting Project 28, auto-add mechanisms, token requirements, and verification.
AGENTS.md	Adds the project-tracker runbook to the canonical “draft-only workflows” and “see also” lists.
.github/workflows/project-tracker.yml	New reusable workflow (and direct issues trigger) that adds labeled issues to Project 28.
.github/README.md	Documents the new “Project Tracker” starter workflow and links to the runbook.