feat: Add Deep Linking Support to LTI in ILIAS 10, Fix Learning Progress Transmission, and Improve LTI Integration

[sergiosant02]

This pull request introduces full Deep Linking (LTI) support to ILIAS Release 10, extending functionality that was previously missing or incomplete in the LTI implementation. In addition, it includes a fix for learning progress transmission, ensuring correct communication between ILIAS and external LTI tools.

Further improvements include several minor refinements to enhance overall stability and clarity of the LTI integration, along with the addition of new language variables for better usability.