Bug 21043: Add debit REST endpoint

Bug 21043: Add debit REST endpoint

This patch adds an endpoint to create a debit for a patron.

Testplan

1. Create a new account debit type (Administration > Debit types)
2. Add a fee with this debit type to a patron’s account via API
3. Make sure that this fee is shown in the accounting overview in the patron’s account in the staff interface
4. Make sure that it is possible to make a payment for this fee

Sponsored-by: The Research University in the Helmholtz Association (KIT)
Signed-off-by: Michaela Sieber <michaela.sieber@kit.edu>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>