Add support for plan block

[lonegunmanb]

Describe your changes

This pull request is based on #180 since we've changed the master branch a lot.

Thanks @hightoxicity for original pr.

Issue number

#180

Checklist before requesting a review

• The pr title can be used to describe what this pr did in CHANGELOG.md file
• I have executed pre-commit on my machine
• I have passed pr-check on my machine

Thanks for your cooperation!

[jiaweitao001]

LGTM. Thanks. 🚢

[hightoxicity]

Thx to have done this work, I am quite busy and was unable to work on it at the moment, sorry for this.

[lonegunmanb]

@hightoxicity It's us who owe you a big thanks, thanks for using our module and thanks for your contribution to this module. We're working on a project called Azure Verified Module, which would convert the legacy modules into a modern version with CI pipeline to improve the quality. To catch up with the schedule I'd like to clean up all remaining issues and prs for these newly converted modules, so I take further steps based on YOUR work, you should take the credit. Our work will fail 100% for sure without the support from the community, without support from you.

Again, thank you!