feat: Instance create (#4502)

* feat(instance): implement create instance with direct machine user and credentials

* fix: deprecated add endpoint and variable declaration

* fix(instance): update logic for pats and machinekeys

* fix(instance): unit test corrections and additional unit test for pats and machinekeys

* fix(instance-create): include review changes

* fix(instance-create): linter fixes

* move iframe usage to solution scenarios configurations

* Revert "move iframe usage to solution scenarios configurations"

This reverts commit 9db31f3808.

* fix merge

* fix: add review suggestions

Co-authored-by: Livio Spring <livio.a@gmail.com>

* fix: add review changes

* fix: add review changes for default definitions

* fix: add review changes for machinekey details

* fix: add machinekey output when setup with machineuser

* fix: add changes from review

* fix instance converter for machine and allow overwriting of further machine fields

Co-authored-by: Livio Spring <livio.a@gmail.com>

internal/api/ui/login/register_org_handler.go

@@ -144,7 +144,7 @@ func (d registerOrgFormData) toCommandOrg() *command.OrgSetup {
 	}
 	return &command.OrgSetup{
 		Name: d.RegisterOrgName,
-		Human: command.AddHuman{
+		Human: &command.AddHuman{
 			Username:  d.Username,
 			FirstName: d.Firstname,
 			LastName:  d.Lastname,