Fetch platinum members via API

Documentation: https://docs.google.com/document/d/1CBpaKvV6pndds5SEL4vW7vFoJiVxMRQ-sQKEFABoMcM/edit

Example response:

[
    {
        "name": "Company",
        "logo": "https://my.typo3.org/uploads/organizations/hash/logo.png",
        "backlink": "https://www.company.com",
        "email": "info@company.com",
        "membership": "PLATINUM"
    }
]

API needs a token to access the information. This token should be included via Extension Configuration (to add it on production only)

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information