Add manifest to slack []

[JuliRossi]

Purpose

We want to use modern app actions parameterSchema and resultSchema for the slack app action.

Approach

• Updated the readme with information to update the dockerfile and serveless node version to 18 to be able to run it locally
• Added manifest to slack app
• Add script to upsert actions from manifest
• Modify the controller => Now it returns what the post actually returns

Did some clean up:

• Fixed some old tests that were failing =>
  - When running all tests, a controller and repository were having conflicts because we didn't restore the mock.
  - Controller type issue with undefined values

Testing steps

As the app action is only used in Workflows, I created a button to run the action with the new format . This video shows that aproach. We also updated the controller tests
What errors look like:

Grabacion.de.pantalla.2025-10-31.a.la.s.4.25.27.p.m.mov