templates: add a new agent role template (pick from list) following the existing ROLE.md pattern

[jsyqrt]

Goal

Markus ships 25 role templates (templates/roles/): researcher, developer, reviewer, ops, finance, HR, SRE... Add a role we don't yet have, following the same structure.

Candidate roles (pick one or propose your own with a clear job description)

• security-auditor (review code/arch for vulnerabilities)
• data-analyst (SQL/reporting agent)
• seo-specialist (web visibility)
• sales-engineer (demo + technical sales)
• localization-manager (i18n coordination)

How

1. Study templates/roles/sre/ROLE.md and templates/roles/secretary/ROLE.md — note the structure: Identity & Expertise, Core Responsibilities, Workflow, Guardrails, metrics
2. Create templates/roles/NEW-ROLE/ROLE.md with:
   • Identity section (who the agent is, core expertise)
   • Core Responsibilities (tables of duties, triggers, outputs)
   • Workflow steps
   • Guardrails / escalation rules
   • Concrete success metrics
3. Add the role to the README package table if roles are listed there
4. Validate: the role directory is discoverable by the agent system (see how templates/roles is loaded — packages/core or packages/org-manager role loading)

Acceptance criteria

• New role directory with ROLE.md following the existing template conventions
• The role appears in the Web UI when creating/editing a team
• No code changes required unless the role registry is hardcoded (then list the registry files you changed)

Size: S · Skill needed: prompt/role design, writing · Great first PR — mostly writing, no deep code.