Manage version from git tags

[FBibonne]

• in the source code (model/build.gradle.kts), thes version should always be 0.0.1-SNAPSHOT for example
• at each pipeline which deploy, the version number is calculated as follows :
  • take the version number of the last tag of the branch
  • compute the next version number using commits messages (to be discuted)
  • update the version number in the released files
  • deploy
  • tag the release with the calculated version