feat: publish with cloud functions

[peterpeterparker]

Replace the build in publish functions with a cloud functions.

This will allow us to trigger either both or only one option of publish PWA and to GitHub.

[peterpeterparker]

@nmattia this PR moves the publish process from the app to the cloud.

this has for advantages:

• less processing on the client side
• errors better handled (like if the user close his/her browser, it doesn't end up in a wrong state)

in addition, it will be easy to add a "push to github" button or plug any other deployment, because it introduces kind of a custom made jobs queue for the Firebase cloud.

to unleash it in production and do some "live testing", it is probably better that you sit behind your laptop in case I would break the API or face some error calling the API from Firebase. ping me when you fix my users and let's do that at the same time.

but yeah, kind of a big change in a core process 😅.

[peterpeterparker]

I also refactored this morning the collections to get rid of that new collection "deploy", makes things cleaner