fix(project): include an option to add project members during project creation (#10654)

# Which Problems Are Solved
When a project is created by a user with only the `PROJECT_CREATOR`
role, they can no longer view/manage the created project. Although the
project is created, the user sees the following error: `No matching
permissions found (AUTH-3jknH)`. This is due to the
[removal](https://github.com/zitadel/zitadel/pull/9317) of
auto-assignment of the `PROJECT_OWNER` role when a project is newly
created.

# How the Problems Are Solved
By introducing optional fields in the CreateProject API to include a
list of users and a list of project member roles to be assigned to the
users. When there are no roles mentioned, the `PROJECT_OWNER` role is
assigned by default to all the users mentioned in the list.

# Additional Changes
N/A

# Additional Context
- Closes #10561 
- Closes #10592
- Should be backported as this issue is not specific to v4

---------

Co-authored-by: conblem <mail@conblem.me>
Co-authored-by: Stefan Benz <46600784+stebenz@users.noreply.github.com>
Co-authored-by: Livio Spring <livio.a@gmail.com>

internal/api/grpc/management/project_converter.go

@@ -18,6 +18,7 @@ import (
 )
 
 func ProjectCreateToCommand(req *mgmt_pb.AddProjectRequest, projectID string, resourceOwner string) *command.AddProject {
+	admins := projectCreateAdminsToCommand(req.GetAdmins())
 	return &command.AddProject{
 		ObjectRoot: models.ObjectRoot{
 			AggregateID:   projectID,
@@ -28,6 +29,7 @@ func ProjectCreateToCommand(req *mgmt_pb.AddProjectRequest, projectID string, re
 		ProjectRoleCheck:       req.ProjectRoleCheck,
 		HasProjectCheck:        req.HasProjectCheck,
 		PrivateLabelingSetting: privateLabelingSettingToDomain(req.PrivateLabelingSetting),
+		Admins:                 admins,
 	}
 }
 
@@ -56,6 +58,20 @@ func privateLabelingSettingToDomain(setting proj_pb.PrivateLabelingSetting) doma
 	}
 }
 
+func projectCreateAdminsToCommand(requestAdmins []*mgmt_pb.AddProjectRequest_Admin) []*command.AddProjectAdmin {
+	if len(requestAdmins) == 0 {
+		return nil
+	}
+	admins := make([]*command.AddProjectAdmin, len(requestAdmins))
+	for i, admin := range requestAdmins {
+		admins[i] = &command.AddProjectAdmin{
+			ID:    admin.GetUserId(),
+			Roles: admin.GetRoles(),
+		}
+	}
+	return admins
+}
+
 func AddProjectRoleRequestToCommand(req *mgmt_pb.AddProjectRoleRequest, resourceOwner string) *command.AddProjectRole {
 	return &command.AddProjectRole{
 		ObjectRoot: models.ObjectRoot{