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/environment.d.ts

@@ -14,6 +14,8 @@ declare global {
 			JWT_SIGNUP_SECRET: string;
       MONGO_URL: string;
       NODE_ENV: 'development' | 'staging' | 'testing' | 'production';
+      VERBOSE_ERROR_OUTPUT: boolean;
+      LOKI_HOST: string;
       CLIENT_ID_HEROKU: string;
       CLIENT_ID_VERCEL: string;
       CLIENT_ID_NETLIFY: string;