Deprecation of the official Discord SDK for RPC

[MinnDevelopment]

Since discord has decided to deprecate the base library this depends on I can no longer continue support for it. The new SDK is not on github and doesn't really offer any good way to make similar bindings since the distribution doesn't offer the same range of platforms or documentation.
Fixing bugs myself in the SDK through pull requests seems out of the picture now.

Deprecation Notice

[rnayabed]

sad. was working on a spotify alternative and thought about integrating discord into it :(