[REF] Remove docs from 16.0 branch

[legalsylvain]

• remove all docs folder

• remove all docsource folder, except coverage file of the current version. (15 -> 16)

• simplify pre-commit stuff, removing exception regarding docs / docsource folders.

• minor changes in main README.md file

Consequency :

• the 16.0 branch is a more "classic" module folder, with less exception
• save CI execution with a reduction of about 20%. (from 13 minutes to 10 minutes)

Note : once validated, I'll do the same for recent branches with new modules design. (14 / 15)

[legalsylvain]

CC :

• @pedrobaeza (following your remark : [DOC] Follow-up of the redesign of the documentation #3839 (comment))
• @etobella, @bguillot, @StefanRijnhart

Note : you can see the altered readme here : https://github.com/legalsylvain/OpenUpgrade/tree/16.0-REM-documentation

[pedrobaeza]

I'm seeing one problem: any merge in 16.0 branch won't trigger a new documentation build. That was one of the reasons for not splitting the documentation branch.

[legalsylvain]

Hi. Thanks for your reviews !

I'm seeing one problem: any merge in 16.0 branch won't trigger a new documentation build. That was one of the reasons for not splitting the documentation branch.

Yes, the problem was raised in the original topic and I answered here :

#3702 (comment)

A PoC is available, feel free to take a look on it.

I'll do a PR against the "master" branch. (16.0 for the time being) to add this file :
https://github.com/grap/openupgrade-doc-test/blob/master/.github/workflows/documentation-commit-schedule.yml
(frequency to decide).

Note : that is unrelated to that PR. For now, the github workflow present in the 16.0 branch and removed by this PR doesn't deploy on oca.github.io/openupgrade

[legalsylvain]

Note : i checked again github doc, and instead of using cron, we can use path filter. Pseudo workflow :

Pull :
Path = modules150-160.rst
Branch = 16.0

https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#onpushpull_requestpull_request_targetpathspaths-ignore

This will even save more CI !

Anyway, @pedrobaeza, unrelated to this PR. Is this one OK for you ?

[pedrobaeza]

Thanks for the cleanup