feat(`forge script`): make it possible to write asynchronous / promises logic

### Component

Forge

### Describe the feature you would like

For example, I would like to do `vm.attachBlob` and wait for that transaction and then wait for some event that comes in response from smart contract after blob is uploaded. I tried using `vm.getLogs` `vm.roll`, `vm.sleep` together with the `--slow` flag, but it doesn't seem to work.

### Additional context

_No response_