feat: action form can be a function

[realSpok]

Definition of Done

General

• [ ] Write an explicit title for the Pull Request, following Conventional Commits specification
• [ ] Test manually the implemented changes
• [ ] Validate the code quality (indentation, syntax, style, simplicity, readability)

Security

• [ ] Consider the security impact of the changes made

[codeclimate[bot]]

Code Climate has analyzed commit 8cda02bf and detected 0 issues on this pull request.

The test coverage on the diff in this pull request is 75.0% (98% is the threshold).

This pull request will bring the total coverage in the repository to 97.5%.

View more on Code Climate.

[Thenkei]

Is it a duplicate of https://github.com/ForestAdmin/agent-nodejs/pull/915/ ?