consistent error message formatting

[hussu010]

we need a document that outlines the error message format that we will be using for various types of error codes.

[wakawakathedev]

Create standard error codes and use those types and respond with those codes to the FE

[wakawakathedev]

Eg.

Type ErrorCodes = {
  Success = 200,
  Unauthorised = 401,
  NotFound = 404,
  Network = 500,
 
}

[amarjeet987]

1. Create a global error handler and place it below all the route handlers.
2. Create error classes like NotFoundError, InternalServerError, etc and extend them from error. Override the statusCode and error message there.
3. You can directly throw these errors from the apis. The error handler will catch them automatically where you can format them as required and send in the response.