feat: Add central error handler

Added:
- Added Midleware to capture and handle all errors
    - will catch error from `throw ...` and `next(...)`
- Added RequestError base error class to build consistent error objects
- Added common errors like `UnauthorizedRequestError`, `BadRequestError`
- Added consistent Logging solution using `winston`
    - Supports Loki Transporter using `winston-loki`
- Outputing Legal disclaimer to console when `TELEMETRY_ENABLED=true`

Changed:
- Changed console.log to getLogger() favor of using consistent logging

backend/src/services/health.ts

@@ -1,10 +1,10 @@
-/* eslint-disable no-console */
 import mongoose from 'mongoose';
 import { createTerminus } from '@godaddy/terminus';
+import { getLogger } from '../utils/logger';
 
 export const setUpHealthEndpoint = <T>(server: T) => {
   const onSignal = () => {
-    console.log('Server is starting clean-up');
+    getLogger('backend-main').info('Server is starting clean-up');
     return Promise.all([
       new Promise((resolve) => {
         if (mongoose.connection && mongoose.connection.readyState == 1) {