Create new module action for Diem Backend

I want to build a custom page in admin (non related to a Model class) for performing various operations (clean up, import, calculation, and son on...). I've not been able to figure out how to do this very simple task.

Append to file: config/dm/modules.yml

Tools:
  myTools:
    myStaticModule:
      name: Click me
      admin: true
      front: false


Clear cache


Refresh backend page