Feature request: StreamBuilder Add_YAMLWithDir

Add option to add yaml with different directory.
As an example:

```yaml
AddResourcesYAMLWithDir(conf string, basePath string)
```

My configs a located at "resources" but they paths are based on "root" path

Doesn't work:
```
import "./fn_maps.blobl"
```

Currently:
```
import "./resources/fn_maps.blobl"
```

So we can call 

```yaml
AddResourcesYAMLWithDir(yamlConfig, "resources")
```