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/api/grpc/resources/user/v3alpha/user.go

@@ -0,0 +1,66 @@
+package user
+
+import (
+	"context"
+
+	"github.com/muhlemmer/gu"
+
+	"github.com/zitadel/zitadel/internal/api/authz"
+	resource_object "github.com/zitadel/zitadel/internal/api/grpc/resources/object/v3alpha"
+	"github.com/zitadel/zitadel/internal/command"
+	"github.com/zitadel/zitadel/internal/zerrors"
+	object "github.com/zitadel/zitadel/pkg/grpc/object/v3alpha"
+	"github.com/zitadel/zitadel/pkg/grpc/resources/user/v3alpha"
+)
+
+func (s *Server) CreateUser(ctx context.Context, req *user.CreateUserRequest) (_ *user.CreateUserResponse, err error) {
+	if err := checkUserSchemaEnabled(ctx); err != nil {
+		return nil, err
+	}
+	schemauser, err := createUserRequestToCreateSchemaUser(ctx, req)
+	if err != nil {
+		return nil, err
+	}
+
+	if err := s.command.CreateSchemaUser(ctx, schemauser, s.userCodeAlg); err != nil {
+		return nil, err
+	}
+	return &user.CreateUserResponse{
+		Details:   resource_object.DomainToDetailsPb(schemauser.Details, object.OwnerType_OWNER_TYPE_ORG, schemauser.ResourceOwner),
+		EmailCode: gu.Ptr(schemauser.ReturnCodeEmail),
+		PhoneCode: gu.Ptr(schemauser.ReturnCodePhone),
+	}, nil
+}
+
+func createUserRequestToCreateSchemaUser(ctx context.Context, req *user.CreateUserRequest) (*command.CreateSchemaUser, error) {
+	data, err := req.GetUser().GetData().MarshalJSON()
+	if err != nil {
+		return nil, err
+	}
+	return &command.CreateSchemaUser{
+		ResourceOwner: authz.GetCtxData(ctx).OrgID,
+		SchemaID:      req.GetUser().GetSchemaId(),
+		ID:            req.GetUser().GetUserId(),
+		Data:          data,
+	}, nil
+}
+
+func (s *Server) DeleteUser(ctx context.Context, req *user.DeleteUserRequest) (_ *user.DeleteUserResponse, err error) {
+	if err := checkUserSchemaEnabled(ctx); err != nil {
+		return nil, err
+	}
+	details, err := s.command.DeleteSchemaUser(ctx, req.GetUserId())
+	if err != nil {
+		return nil, err
+	}
+	return &user.DeleteUserResponse{
+		Details: resource_object.DomainToDetailsPb(details, object.OwnerType_OWNER_TYPE_ORG, details.ResourceOwner),
+	}, nil
+}
+
+func checkUserSchemaEnabled(ctx context.Context) error {
+	if authz.GetInstance(ctx).Features().UserSchema {
+		return nil
+	}
+	return zerrors.ThrowPreconditionFailed(nil, "TODO", "Errors.UserSchema.NotEnabled")
+}