feat(matrix-nutriphi-bot): add Matrix bot for nutrition tracking

- NestJS bot with matrix-bot-sdk integration
- Commands: !help, !login, !analyze, !today, !week, !goals, !favorites, !tips
- Integrates with NutriPhi backend API (port 3023)
- User session management with JWT authentication
- Image analysis via Gemini AI (NutriPhi backend)
- Port 3316

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

services/matrix-nutriphi-bot/.env.example

@@ -0,0 +1,20 @@
+# Server
+PORT=3316
+NODE_ENV=development
+
+# Matrix
+MATRIX_HOMESERVER_URL=http://localhost:8008
+MATRIX_ACCESS_TOKEN=syt_xxx_your_bot_token
+MATRIX_ALLOWED_ROOMS=#nutriphi:matrix.mana.how
+MATRIX_STORAGE_PATH=./data/bot-storage.json
+
+# NutriPhi Backend
+NUTRIPHI_BACKEND_URL=http://localhost:3023
+NUTRIPHI_API_PREFIX=/api/v1
+
+# Mana Core Auth
+MANA_CORE_AUTH_URL=http://localhost:3001
+
+# Development bypass (optional)
+DEV_BYPASS_AUTH=false
+DEV_USER_ID=