feat: add schema user create and remove (#8494)

# Which Problems Are Solved

Added functionality that user with a userschema can be created and
removed.

# How the Problems Are Solved

Added logic and moved APIs so that everything is API v3 conform.

# Additional Changes

- move of user and userschema API to resources folder
- changed testing and parameters
- some renaming

# Additional Context

closes #7308

---------

Co-authored-by: Elio Bischof <elio@zitadel.com>

internal/repository/user/schemauser/eventstore.go

@@ -0,0 +1,9 @@
+package schemauser
+
+import "github.com/zitadel/zitadel/internal/eventstore"
+
+func init() {
+	eventstore.RegisterFilterEventMapper(AggregateType, CreatedType, eventstore.GenericEventMapper[CreatedEvent])
+	eventstore.RegisterFilterEventMapper(AggregateType, UpdatedType, eventstore.GenericEventMapper[UpdatedEvent])
+	eventstore.RegisterFilterEventMapper(AggregateType, DeletedType, eventstore.GenericEventMapper[DeletedEvent])
+}