Extract code about RemoteFile scanning into RemoteContentScanner

Description

Extract code to scan remote content and define what to do with result into a dedicated class and new package: foundation.e.drive.contentScanner.RemoteContentScanner.

Refactor code to make it smaller, simpler and easier to read

⚠ Only the last commits are the one from this MR. Others are due to previous MR First commit to consider is: fdb2c84b

Issue(s)

https://gitlab.e.foundation/e/os/backlog/-/issues/657

Check list

• Self review
• Test procedure explained
• Tested on fresh install
• Tested applied as an update
• License
• Internal documentation
• User documentation