0.4.0 — Team Relay: presence + coordinator force-shelve over a generic relay

- host.team bridge + 'team' permission (SDK)
- backend: relay_http (generic HTTP pipe), p4_shelve_open, p4_protects_max
- new plugin team-relay (opt-in): Team dock, presence loop, force-shelve
- relay server (exbyte-relay/) — generic zero-dep message bus, no Perforce knowledge

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

plugins-examples/team-relay/plugin.json

@@ -0,0 +1,12 @@
+{
+  "id": "team-relay",
+  "name": "Team Relay",
+  "version": "1.0.0",
+  "author": "Exbyte Studios",
+  "description": "See who on the team is online and what they have open, over a lightweight relay on your VPN. Coordinators (admin/super) can force-shelve a teammate's open work to the server when they've stepped away — the teammate's client does the shelve; nothing is submitted. Configure the relay URL in the Team tab. Requires the Exbyte relay service.",
+  "entry": "index.js",
+  "minAppVersion": "0.4.0",
+  "permissions": ["team", "notify"],
+  "defaultEnabled": false,
+  "contributes": { "dock": ["team"] }
+}