Move all post-installation, first launch, etc. tasks from scripts/bat to Java/RCP

Move all post-installation, first launch, etc. tasks from scripts/sh/bat files to Java (RCP or Core).

Notes/Specifications [WIP SJ]

The tasks are different for each OS.
Some tasks may be can not be moved, eg. Linux R permissions.
The tasks should be done in 3 fragments as we do for embedding native code or native third-party applications such R or CQP so only the specific OS tasks are delivered for a specific OS.
For RCP, ApplicationWorkbenchAdvisor.preStartup() may be useful (but may be better to put the tasks at Core/Toolbox level).

(from redmine: issue id 3524, created on 2023/12/01 by Sebastien Jacquot)