Add initial files for Audio Dashboard Management System

- Created .env.example for environment variable configuration.
- Added docker-compose.yml for service orchestration.
- Implemented frequency response extraction in extract_frequency_response.py and convert_to_frequency_db.py.
- Generated output files: frequency_response_detailed.json, frequency_response_points.json, frequency_response.csv, and frequency_response_curve.png.
- Included sample measurement data for FiiO FA19 in CSV format.

frontend/package.json

@@ -11,7 +11,8 @@
     "vue": "^3.3.4",
     "vue-router": "^4.2.4",
     "axios": "^1.5.0",
-    "element-plus": "^2.3.14"
+    "element-plus": "^2.3.14",
+    "@element-plus/icons-vue": "^2.1.0"
   },
   "devDependencies": {
     "@vitejs/plugin-vue": "^4.3.4",