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/ingestion/service.err

@@ -0,0 +1,16 @@
+C:\Users\RaymondVerhoef\Gitea\learning-platform\app\services\ingestion\node_modules\.bin\tsx:2
+basedir=$(dirname "$(echo "$0" | sed -e 's,\\,/,g')")
+          ^^^^^^^
+
+SyntaxError: missing ) after argument list
+    at wrapSafe (node:internal/modules/cjs/loader:1662:18)
+    at Module._compile (node:internal/modules/cjs/loader:1704:20)
+    at Object..js (node:internal/modules/cjs/loader:1895:10)
+    at Module.load (node:internal/modules/cjs/loader:1465:32)
+    at Function._load (node:internal/modules/cjs/loader:1282:12)
+    at TracingChannel.traceSync (node:diagnostics_channel:322:14)
+    at wrapModuleLoad (node:internal/modules/cjs/loader:235:24)
+    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:171:5)
+    at node:internal/main/run_main_module:36:49
+
+Node.js v22.16.0