Add support for single Panopto links

Introduces panopto_single.py, which enables users to download lessons from UniVR Panopto. The script accepts a list of Panopto links either from a file or as a command-line argument, and it downloads the corresponding lessons to a specified output directory.

Key Features:

• Downloads lessons from UniVR Panopto by providing a list of links.
• Handles multiple links in a file or a single link from the command line.
• Supports specifying an output directory for downloaded files.
• Error handling is implemented to handle cases where the lesson data cannot be retrieved or downloaded.

Usage:

python panopto_single.py --help

Related Issues:

• Closes #23 (closed)