Declarative blueprints (based on file exists)

**Is your feature request related to a problem? Please describe.**
A option to define a state of resources by an blueprint (Declarative). And not like current define a change/migration (Procedural).

**Describe the solution you'd like**
That if file is detected the resources are created / updated (like `state: present`) and remove of the file would delete resources (like `state: absent`) with an new state type like `state: watch`

**Describe alternatives you've considered**
easy way to remove based on an blueprint yaml file (without change of file).

**Additional context**
it is for me like ansible vs. terraform ....