📚 Improve diagrams for the git flow and move translation flow

[pleonex]

Improve the diagrams and add more details about the proposed git flow process and versioning.

Also, move the WIP localization workflow into the il28n project.

Quality check list

• Related code has been tested automatically or manually
• Related documentation is updated
• I acknowledge I have read and filled this checklist and accept the
  developer certificate of origin

Acceptance criteria

• Add details about the git branching strategy by use case

Follow-up work

• Create an overview page
• Create a release process template (Document release process #83)