Add specifications for gamification, generation, and R42 chat services

- Introduced gamification service spec detailing responsibilities, API surface, XP calculation, levels, streaks, badges, milestone cards, and heatmap data.
- Added generation service spec outlining the process for generating micro learning content, including API endpoints, AI call configuration, prompt strategies, and error handling.
- Created R42 chat service spec covering chatbot interactions, retrieval pipeline, prompt construction, response generation, and stateless design principles.

app/pb_migrations/1779544653_updated_users.js

@@ -0,0 +1,52 @@
+/// <reference path="../pb_data/types.d.ts" />
+migrate((db) => {
+  const dao = new Dao(db)
+  const collection = dao.findCollectionByNameOrId("_pb_users_auth_")
+
+  // add
+  collection.schema.addField(new SchemaField({
+    "system": false,
+    "id": "mx3g38jd",
+    "name": "role",
+    "type": "select",
+    "required": true,
+    "presentable": false,
+    "unique": false,
+    "options": {
+      "maxSelect": 1,
+      "values": [
+        "admin",
+        "employee"
+      ]
+    }
+  }))
+
+  // add
+  collection.schema.addField(new SchemaField({
+    "system": false,
+    "id": "pgfyrf71",
+    "name": "display_name",
+    "type": "text",
+    "required": false,
+    "presentable": false,
+    "unique": false,
+    "options": {
+      "min": null,
+      "max": null,
+      "pattern": ""
+    }
+  }))
+
+  return dao.saveCollection(collection)
+}, (db) => {
+  const dao = new Dao(db)
+  const collection = dao.findCollectionByNameOrId("_pb_users_auth_")
+
+  // remove
+  collection.schema.removeField("mx3g38jd")
+
+  // remove
+  collection.schema.removeField("pgfyrf71")
+
+  return dao.saveCollection(collection)
+})