feat: add centralized error logging system

- Implemented Error Log API to capture and store error logs from various services.
- Updated admin_ui to include Error Log Viewer component for inspecting logs.
- Enhanced error handling in auth_api, employee_api, and transit_api to report errors to the Error Log API.
- Modified existing services to utilize the new error logging functionality.
- Updated Docker Compose configuration to include the Error Log API service.
- Added error logging service in bus_terminal for Flutter application.

error_log_api/package.json

@@ -0,0 +1,20 @@
+{
+  "name": "error_log_api",
+  "version": "1.0.0",
+  "description": "Central error logging API",
+  "license": "ISC",
+  "author": "",
+  "type": "commonjs",
+  "main": "index.js",
+  "scripts": {
+    "start": "node index.js",
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "dependencies": {
+    "cors": "^2.8.5",
+    "dotenv": "^16.4.5",
+    "express": "^4.21.2",
+    "jsonwebtoken": "^9.0.2",
+    "pg": "^8.13.0"
+  }
+}