Add Duskfade auto splitter

[Zyrumi]

Adds the any% autosplitter for Duskfade.

• Auto-start on New Game, splits along the any% route (every split is its own setting), final split on the credits. Optional auto-reset on returning to the main menu (off by default).
• Load removal via isLoading.
• Read-only: reads game memory (GWorld/FName) and the game's save files, never writes to either.

Source: https://github.com/Zyrumi/duskfade-autosplitters (GPL-3.0). The main branch there only holds tested scripts.

If you are adding or modifying an Auto Splitter, please fill out this checklist:

• My Auto Splitter does not contain any malicious functionality and I'm entirely responsible for any damages myself. (Any kind of abuse in an Auto Splitter will result in an immediate ban.)
• I am not replacing an existing Auto Splitter by a different author, or I have received permission from the author to replace the existing Auto Splitter.
• The Auto Splitter has an open source license that allows anyone to fork and host it.

[Zyrumi]

@wooferzfg It appears my description was too long, I've shortened it down a bit so hopefully it's all good now 🤞