Add the option for selecting nodes based off VOICE_SERVER_UPDATE endpoint region

[PapiOphidian]

For whatever reason, git decided to include the commit where I updated the links to freyacodes/LavaLink in this PR, but shouldn't be too much of an issue with a squash merge.

This has been tested to work.

This does require the user to define regions and does not offer fallback to a random node because it may be unintentional, although not all of the regions shown through the VOICE_SERVER_UPDATE endpoint field are displayed somewhere. I plan to create a table of regions I personally have seen. Although, the lib will display the region it could not select, so new nodes could be added to the map as they're created

[PapiOphidian]

It seems as though this approach is no longer recommended as Discord selects a voice region which is central to everyone in the voice channel and only adds extra async overhead.