Support for import blocks

[kmataru]

Is your feature request related to a problem? Please describe.
When having to run lots of terraform import commands it can become frustrating when there are lots of resources to import.

Describe the solution you'd like
Have an extra parameter where the user can land a path to .tf file containing only import blocks (https://developer.hashicorp.com/terraform/language/import).

Describe alternatives you've considered
Manual terraform import, but it's time consuming for 100, 1000 resources.