feat: first official release on pypi

Generated the library from the modified json api. Some customizations:

1. added the json api endpoint for "admin_authorized_organizational_units_get" to have its function generated
2. Customly defined the function family "preingest_deposits_contributors_get/post/delete_by_id" inspired by similar functions from the library. Function code put in "_deposits_contributor_addendum.py" and instruction on how to patch it in the library put in GENERATEME.md
3. Added metadata in the main "setup.py" file with a pre-treatment on the README to have it working as a lond description in the pypi page.