add all possibe error to error list with constants

[rishabhborn2win]

This file will have a list of mostly all the errors possible in the backend with the error constants so that by the error code we can easily get to know what is the error and while error we can directly share the constants to the user.

[rishabhborn2win]

Take the ref. of the code snippet while creating the errors list Object

[rishabhborn2win]

@rvr007-glitch What is the update for the task?

[rishabhborn2win]

@rvr007-glitch Are you facing any kind of difficulty while doing this task then have a discussion with me