Add instructions on how to use the BG3 Script Extender

[atomjack]

Is your feature request related to a problem? Please describe.
Mods that require Norbyte's Script Extender (like 5e Spells) don't work unless some special configuration is done.

Describe the solution you'd like
Additions to the documentation to illustrate how to do this.

Describe alternatives you've considered
I tried using the BG3SE-Updater*.zip as a Bin Overwrite and as an Engine Injection, but neither of those worked.

Additional context
I was able to find instructions on how to do this and thought it would be helpful that Lampray includes these instructions, but I want your thoughts on where they should go in the documentation. Here are the instructions:

1. Download the latest release of Norbyte's Script Extender.
2. Extract the DWrite.dll file to the Baldur's Gate bin directory (e.g. ~/.local/share/Steam/steamapps/common/Baldurs Gate 3/bin/)
3. In Steam, update the Launch Options (via Properties->General) to WINEDLLOVERRIDES="DWrite.dll=n,b" PROTON_NO_ESYNC=1 %command