Add manifest to slack [MAPS-70]

[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:

• Updated some necessary deps
• 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:

What it correctly working looks like (this response is only showing blocks so we don't show any ids)

Grabacion.de.pantalla.2025-10-27.a.la.s.4.53.44.p.m.mov

Showing how the script works updating actions

Grabacion.de.pantalla.2025-10-27.a.la.s.5.16.11.p.m.mov

Showing how it works creating actions:

Grabacion.de.pantalla.2025-10-27.a.la.s.5.03.12.p.m.mov

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[ryunsong-contentful]

Did some light testing with the slack app and still works.

Nice job