add matrix publish/consume transport for orchestrator rail

templates/repo/.mosaic/README.md

@@ -45,3 +45,10 @@ Run continuously:
 ```bash
 ~/.mosaic/bin/mosaic-orchestrator-run --poll-sec 10
 ```
+
+Bridge events to Matrix:
+
+```bash
+~/.mosaic/bin/mosaic-orchestrator-matrix-publish
+~/.mosaic/bin/mosaic-orchestrator-matrix-consume
+```

templates/repo/.mosaic/orchestrator/config.json

@@ -4,7 +4,9 @@
   "matrix": {
     "control_room_id": "",
     "workspace_id": "",
-    "homeserver_url": ""
+    "homeserver_url": "",
+    "access_token": "",
+    "bot_user_id": ""
   },
   "worker": {
     "runtime": "codex",

templates/repo/.mosaic/orchestrator/matrix_state.json

@@ -0,0 +1,4 @@
+{
+  "last_published_line": 0,
+  "since": null
+}