feat: implement user schema management (#7416)

This PR adds the functionality to manage user schemas through the new user schema service.
It includes the possibility to create a basic JSON schema and also provides a way on defining permissions (read, write) for owner and self context with an annotation.

Further annotations for OIDC claims and SAML attribute mappings will follow.

A guide on how to create a schema and assign permissions has been started. It will be extended though out the process of implementing the schema and users based on those.

Note:
This feature is in an early stage and therefore not enabled by default. To test it out, please enable the UserSchema feature flag on your instance / system though the feature service.

internal/static/i18n/en.yaml

@@ -546,6 +546,16 @@ Errors:
     NotFound: Execution not found
     IncludeNotFound: Include not found
     NoTargets: No targets defined
+  UserSchema:
+    NotEnabled: Feature "User Schema" is not enabled
+    Type:
+      Missing: User Schema Type missing
+      AlreadyExists: User Schema Type already exists
+    Authenticator:
+      Invalid: Invalid authenticator type
+    NotActive: User Schema not active
+    NotInactive: User Schema not inactive
+    NotExists: User Schema does not exist
 
 AggregateTypes:
   action: Action
@@ -559,6 +569,7 @@ AggregateTypes:
   feature: Feature
   target: Target
   execution: Execution
+  user_schema: User Schema
 
 EventTypes:
   execution:
@@ -1236,6 +1247,12 @@ EventTypes:
         password:
           changed: Password of SMTP configuration changed
         removed: SMTP configuration removed
+  user_schema:
+    created: User Schema created
+    updated: User Schema updated
+    deactivated: User Schema deactivated
+    reactivated: User Schema reactivated
+    deleted: User Schema deleted
 
 Application:
   OIDC: