Intuit-oauth

- Added support for Python 3.12
- Removed `future` dependency
- Cleanup of static files

Added support for `401k` use case. Changes added :

1.) `setAuthorizeURLs` helper function to pass custom auth URL's
2.) Payslip `Enum` added
3.) Utils modification to handle any custom discovery doc URL's passed as `plain` string

Fixed a typo in the enum definition.

Fix the 404 error when making call to discovery endpoint

1. Add support for scope `intuit_name` for migrated apps only - to not see consent page.
2. Incorporate change for dependent library `enum34` as discussed in PR 4

The client supports the following operations:
- Generating Authorization URL
- Getting OAuth2 Bearer Token
- Getting User Info
- Validating OpenID token
- Refreshing OAuth2 Token
- Revoking OAuth2 Token
- Migrating tokens from OAuth1.0 to OAuth2

This release also:
- Added Payroll scopes supported for whitelisted Beta apps only
- Fixed issue 2