Add Neon access review driver support

Register Neon as a connector provider and add a new access review
driver that fetches organization members from the Neon API with
cursor-based pagination.

Neon's OAuth is partner-gated, so the connector is API-key only
(Bearer, the default scheme). A personal or organization API key can
belong to several organizations; the operator supplies the ID of the
one to review. The members endpoint exposes per-user MFA state
(has_mfa) and deactivation, which map to the access entry MFA status
and active flag; the stable account UUID (user_id) is used as the
external ID over the membership ID.

Signed-off-by: Aurélien Sibiril <81782+aureliensibiril@users.noreply.github.com>

pkg/coredata/connector_provider.go

@@ -64,6 +64,7 @@ const (
 	ConnectorProviderZendesk      ConnectorProvider = "ZENDESK"
 	ConnectorProviderQovery       ConnectorProvider = "QOVERY"
 	ConnectorProviderRender       ConnectorProvider = "RENDER"
+	ConnectorProviderNeon         ConnectorProvider = "NEON"
 )
 
 var (
@@ -115,6 +116,7 @@ func ConnectorProviders() []ConnectorProvider {
 		ConnectorProviderZendesk,
 		ConnectorProviderQovery,
 		ConnectorProviderRender,
+		ConnectorProviderNeon,
 	}
 }
 
@@ -161,7 +163,8 @@ func (v ConnectorProvider) IsValid() bool {
 		ConnectorProviderOkta,
 		ConnectorProviderZendesk,
 		ConnectorProviderQovery,
-		ConnectorProviderRender:
+		ConnectorProviderRender,
+		ConnectorProviderNeon:
 		return true
 	}