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/services/curriculum/src/index.ts

@@ -0,0 +1,18 @@
+import 'dotenv/config';
+import Fastify from 'fastify';
+import { curriculumRoutes } from './routes/curriculum.js';
+import { employeeRoutes } from './routes/employee.js';
+
+const app = Fastify({ logger: true });
+
+await app.register(curriculumRoutes);
+await app.register(employeeRoutes);
+
+const port = parseInt(process.env['CURRICULUM_PORT'] ?? '3003', 10);
+
+try {
+  await app.listen({ port, host: '0.0.0.0' });
+} catch (err) {
+  app.log.error(err);
+  process.exit(1);
+}