✨ 454 - implement ega job flow

[anncatton]

Work for #454

Implements (mostly happy path) EGA permission reconciliation flow. Error handling needs to be improved in main job function and service calls - in most cases errors encountered should not stop the script from running, but would be useful to report/collect somehow, for debugging/possible retry scenarios.

Note: The logger setup is becoming a PITA, might be useful to replace with more robust logger that implements what buildMessage is doing automatically

EgaClient

• adds error cases for 400 errors in axios interceptor
• adds error handling for 400 - Permission does not exist to revokePermissions - this was caught while debugging ega api pagination issue

Job

• adds main function for reconciliation flow, using functions found in /services

Utils

• adds createPermissionApprovalRequest func for creating permission approval request objects

Types

• adds nullable() to some of the response type fields. These values are not used in the recon flow
• updates RevokePermissionsFailure type to include PERMISSION_DOES_NOT_EXIST
• adds type for combined EGA - DACO user type for creating a map to check existing permissions when iterating over user list
• moves errors.ts to types dir, adds custom errors for BadRequest and ServerError

Code cleanup/readability

• creates a services/ folder for service functions related to users and permissions need in the main reconciliation job
• adds a constants file for pagination values