Brief overview of PR changes/additions

• Updated command line arguments to accept any URI or file path (first positional argument)
• Made MudletInstanceHandler packages generic so any URI can be passed to another Mudlet Instance.
• Updated mudlet.desktop, registry keys, and Plist (see https://github.com/Mudlet/installers/pull/115) to handle opening telnet links on each operating system.
• Reused telnet ui components and profile selection logic from https://github.com/Mudlet/Mudlet/pull/3131

Motivation for adding to Mudlet

fixes https://github.com/Mudlet/Mudlet/issues/689 /claim #689

Other info (issues closed, discussion etc)

I’m having trouble testing the linux telnet file association on my machine. I think I have something misconfigured that’s not part of the Mudlet repo. I placed MimeType=x-scheme-handler/telnet;application/zip; in mudlet.desktop and ran xdg-mime default mudlet.desktop x-scheme-handler/telnet to set default.

Testing: open http://www.durismud.com and click on on the Play now link.