Add agent-skills config for Gitea + triage

Scaffolds the per-repo config the mattpocock engineering skills expect:
- AGENTS.md with the ## Agent skills block (issue tracker, triage labels, domain docs)
- docs/agents/issue-tracker.md — Gitea REST API workflow (gh/glab don't apply)
- docs/agents/triage-labels.md — canonical role -> Gitea label mapping (1:1)
- docs/agents/domain.md — single-context CONTEXT.md/ADR consumer rules

Triage state labels (needs-triage, needs-info, ready-for-agent, ready-for-human,
wontfix) created in the tracker; all open issues seeded with needs-triage.
Run triage with /mattpocock-skills:triage.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01DgbgipE41xwPcQJnhnq1J1

docs/agents/triage-labels.md

@@ -0,0 +1,28 @@
+# Triage Labels
+
+The skills speak in terms of canonical triage roles. This file maps those roles to the actual
+label strings used in this repo's Gitea tracker (`BPPP/smb-online`). We use the canonical names
+verbatim, so the mapping is 1:1.
+
+## Category roles (exactly one per triaged issue)
+
+| Role in mattpocock/skills | Label in our tracker | Meaning                        |
+| ------------------------- | -------------------- | ------------------------------ |
+| `bug`                     | `bug`                | Something is broken            |
+| `enhancement`             | `enhancement`        | New feature or improvement     |
+
+## State roles (exactly one per triaged issue)
+
+| Role in mattpocock/skills | Label in our tracker | Meaning                                  |
+| ------------------------- | -------------------- | ---------------------------------------- |
+| `needs-triage`            | `needs-triage`       | Maintainer needs to evaluate this issue  |
+| `needs-info`              | `needs-info`         | Waiting on reporter for more information |
+| `ready-for-agent`         | `ready-for-agent`    | Fully specified, ready for an AFK agent  |
+| `ready-for-human`         | `ready-for-human`    | Requires human implementation            |
+| `wontfix`                 | `wontfix`            | Will not be actioned                     |
+
+When a skill mentions a role (e.g. "apply the AFK-ready triage label"), use the corresponding
+label string from these tables. Attach labels via the Gitea API by **label id** — see
+`docs/agents/issue-tracker.md` and `GET $API/labels` for the live id↔name mapping.
+
+Edit the right-hand column if the vocabulary ever diverges.