Add content only found in classic PDF guides

[aputtu]

On erda.ku.dk we have the main ERDA User Guide and various intro guides.

We need to make sure we get all content moved over to Sphinx documentation, so that it can become searchable.
We accept including the classic PDF guides as static content, so we can go live before completing the tasks.
However, this ticket is created to make sure we actually get to a point where the need for them is gone.

[aputtu]

toc-old-doc_2024-07-23.txt
In attached txt I've added an overview of the guides, including a breakdown of the major User Guide + one FAQ item that has been added very recently.
(Basically, this is what needs to be included. I'll our Sphinx now, see what has not been ported, and add missing sections as subtask.)

[aputtu]

Initial breakdown of what we still are missing.
Under "How to Access UCPH ERDA"

• Files (@SebastianPrehn)
• File Sharing and Data Exchange
• Settings + Setup
  Under "Advanced Data Access"
• WebDAVS
• SFTP
• FTPS
• WebDAVS/SFTP/FTPS Access to Share Links
• Automatic Backup to ERDA
• Schedule Tasks
• Data Import/Export

Also main sections:

• Courses and External Collaboration
• Support, Questions and Comments

FAQ item:

• Can I use SSH to log in or use rsync to synchronize data with ERDA

[SebastianPrehn]

WebDAVS and SFTP should be concluded with https://migrid-user-docs.readthedocs.io/en/latest/sections/erda/networkdrive/index.html

It would potentially be an idea to add Share Links sections to each of those, or a third page in that selection describing it, as well as as a page for FTPS.

Potentially https://migrid-user-docs.readthedocs.io/en/latest/sections/erda/files/index.html is a good start or the task "File Sharing and Data Exchange"