Publish each module merge to a module directory

[hparfr]

Is your feature request related to a problem?

For humans: I need an easy way to find existance of known module for each versions.
For machines:

• Keep track of what module are available now.
• Be able to generate part of openupgrade/apriori.py automatically

One of my long term goal, is to be able to know for a given project in one version, what modules need to be ported.

Non goals:

• show dependency paths
• manage module versions

Describe the solution you'd like

I would like oca-github-bot to automatically publish to a dedicated repo, when a module merged.
The information stored will be: {odoo version}, { module name }, {org = OCA}, { repo }

In case of module move to another repo, merged to another module, split between modules, the infromation will be {odoo version}, { module name }, {org = OCA}, { repo }, { org = OCA }, { repo in previous version }, { module name in previous version }.
This require #317 and it will make a stone with two shots kill two birds with one stone.

Describe alternatives you've considered

Pypi: look if a module is in pypi works only if org = oca.
OCA app store: do not work for different org.

Additional context

Add any other context about the feature request here.