[#8813] Add kiezradar delete modal

[sevfurneaux]

Describe your changes
This PR adds a delete modal for deleting kiezradars.

Tasks

• PR name contains story or task reference
• Steps to recreate and test the changes
• Documentation (docs and inline)
• Tests (including n+1 and django_assert_num_queries where applicable)
• Changelog

[sevfurneaux]

I kept this component in the KiezradarList file as it wasn't used elsewhere. Can extract if that's a preference.

[hom3mad3]

see my message below

[hom3mad3]

Hey @sevfurneaux, looks good, thanks! Just one thing: I recently refactored a4/Modal.jsx. We already have a delete modal, but it's currently only used in comments, so I didn't create a reusable one.

The changes aren’t merged yet: PR #1758.
Should we wait until Modal is merged and then move it over to a4? Do you want me to take this part over?

[sevfurneaux]

Thanks @hom3mad3!

Is it ok if we merge this in, and then once the modals are completed/moved over to A4, we can retrospectively change this? The reason being, this implementation allows for #8751 [mB] Kiezradar frontend: managing Kieze on the "Ihre Kieze" ("Kieze verwalten") page (sev) to be completed, then Janek/Carolin can test the full kiezradar flow (creation, editing, deletion).

[hom3mad3]

Thanks @hom3mad3!

Is it ok if we merge this in, and then once the modals are completed/moved over to A4, we can retrospectively change this? The reason being, this implementation allows for #8751 [mB] Kiezradar frontend: managing Kieze on the "Ihre Kieze" ("Kieze verwalten") page (sev) to be completed, then Janek/Carolin can test the full kiezradar flow (creation, editing, deletion).

sounds good, i will file an issue! thank you ✨