Feature request: Add soundcloud in lavalink search.

Created by: nathan130200

In official Lavaplayer i found this search prefix like ytsearch: but for soundcloud scsearch:

SoundCloudAudioSourceManager.java#L72

Can create an enum like:

public enum SearchType
{
    Youtube,
    Soundcloud
}

and grab this enum in GetTracksAsync

        public Task<LavalinkLoadResult> GetTracksAsync(string searchQuery, SearchType type = SearchType.Youtube)
        {
            var stype = type == SearchType.Youtube ? "ytsearch" : "scsearch";
            var str = WebUtility.UrlEncode($"{stype}:{searchQuery}");
            var tracksUri = new Uri($"http://{this.Configuration.RestEndpoint}/loadtracks?identifier={str}");
            return this.InternalResolveTracksAsync(tracksUri);
        }