Initial mqtt calls for endpoints

[FelipeTrost]

Summary

Initial implementation of mqtt requests for engines and overview of engines for admins.

[jjoderis]

When i go to /admin/engines i get an error.

[FelipeTrost]

When i go to /admin/engines i get an error.

@jjoderis did you have a mqtt broker running and the env vars set?

[jjoderis]

Ah i see. No i didn't. Would it be a valid option to hide the entry from the Dashboard if the mqtt environment values are not set? From what i understand the route cannot work without them.
And are there upsides and downsides to using environment variables instead of configuration entries for this? I guess it would not really be possible to change the mqtt server address or password while the MS is running using environment variables

[FelipeTrost]

I think it would be better to show a message that mqtt isn't set up, what do you think?

I remember Kai saying that he wanted the mqtt credentials in the environment variables, I think for now it is ok.

[jjoderis]

I see. I think a specific message about mqtt not being set up would possibly improve the user experience.

[github-actions]

✅ Successfully created Preview Deployment.

https://pr-403---ms-server-staging-c4f6qdpj7q-ew.a.run.app

[jjoderis]

LGTM
Maybe add a some comments to your typescript endpoint helpers to make it easier to grasp what they do and they work.

[jjoderis]

I would maybe add one or two comments to this file to explain what exactly these types do.
And is "Count" actually a fitting name? I looks like it is a list of all arguments that are behind a ":" in the string.