SCIM support

[DecDuck]

We should implement an SCIM-compatible endpoint for syncing user accounts to Drop. It's a RESTful protocol, and only uses a couple endpoints, so should be fairly doable. Famous last words, though.

• https://workos.com/blog/scim-implementation-examples
• https://www.merge.dev/blog/how-scim-provisioning-works
• https://developers.onelogin.com/scim/implement-scim-api

[CEbbinghaus]

Just butting in to give my 2c, but I would hold off on this feature, perhaps even indefinitely. SCIM can be a bitch and there is very rarely ever any demand for it. Its a very enterprise requirement that normal self hosters will rarely if ever need (if you do require SCIM. Please comment below). I would much rather see LDAP support (although even that isn't as important as OIDC which Drop already has)