[PLT-1317] Add back support for project JSON type

[vbrodsky]

Story: https://labelbox.atlassian.net/browse/PLT-1317

Description

We are making changes to the api to include back project with custom or no editors with Client get_projects() . This change is required to support projects with custom editors (media type = JSON)
But not

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Document change (fix typo or modifying any markdown files, code comments or anything in the examples folder only)

All Submissions

• Have you followed the guidelines in our Contributing document?
• Have you provided a description?
• Are your changes properly formatted?

New Feature Submissions

• Does your submission pass tests?
• Have you added thorough tests for your new feature?
• Have you commented your code, particularly in hard-to-understand areas?
• Have you added a Docstring?

Changes to Core Features

• Have you written new tests for your core changes, as applicable?
• Have you successfully run tests with your changes locally?
• Have you updated any code comments, as applicable?

[vbrodsky]

Not needed, see https://labelbox.slack.com/archives/C040H094D4Y/p1721320655737269?thread_ts=1721305760.691949&cid=C040H094D4Y