Update README.md about UWP, .NET MAUI, WIN UI 3

[J0nathan550]

Fix of #236
Problem was that UWP applications along with .NET MAUI and WIN UI 3 requires certain capabilites and trust in order to load this library, without it the library doesn't do anything, because UWP blocks all restricted movement of loading external .exe's.

It doesn't fire any exception in the library, but after digging I figure out why this was the error. And again, error was in restrictions.

It's good to change README.md because, there can be people like me who don't understand why this doesn't work.

And until we will find out what capabilites we need to provide to UWP, it's okay to put runFullTrust, because that's the only way make it work.

I hope you understand that, waiting for the possible approve.

[Lachee]

Just minor wording concerns here and general clues as to what might be blocking the UWP.
I dont like the implication that the library loads external exes. The only thing it does load is Newtonsoft.JSON's dll.

Discord handles the execution of the game's exes themselves.

[Lachee]

this library does not load exeternal exes, or any exes actually. Please reword this.

some potential causes could be:

• use of registry keys in WindowsUriSchemeCreator.cs
• use of pipes in ManagedNamedPipeClient.cs

but unless verified what is causing it, please only mention that runFullTrust is required.

From reading the capability declarations, it could also be from .JSON using JIT capabilities, although this is not a restricted capability (Code Generation).

[Lachee]

awesome! thanks for the contribution :)