Moving source code to `library` module

[LVMVRQUXL]

Description

Like discussed in #298, we would like to move the existing source code to the library module, introduced in the issue #300.
This change invalidates the scripts and the workflows that will need to be updated.

Dependencies

This issue is blocked by the following ones:

• New library module #300
• New delivery workflow for library module #301

Checklist

• Remove sample code from the library module.
• Move the source code to the library module.
• Remove workflows that was using the root project.
• Update scripts that was using the root project.
• Check the generated documentation of the library module.
• Update the public API binaries of the library module.
• Update the Unreleased section in CHANGELOG.

[LVMVRQUXL]

See #298 (comment) for more details.