Add overview repo and verae-nats-process expansion template

High-level system map with diagrams, TOC, and a docs index. Template
worker shows how to add a new verae.* address for search, storage, or
unplanned functions without teaching Zapier NATS.

packages/verae-nats-process/fleet.service.json

@@ -0,0 +1,14 @@
+{
+  "id": "verae-nats-process",
+  "title": "Template addressed process",
+  "kind": "nats-worker",
+  "package": "verae-nats-process",
+  "role": "verae-nats-process",
+  "managed": true,
+  "health": { "type": "http", "path": "/health", "timeoutMs": 800 },
+  "ports": { "healthBase": 13900 },
+  "nats": {
+    "in": ["verae.example.process.in"],
+    "out": ["verae.example.process.out", "verae.example.process.reply.<correlationId>"]
+  }
+}