- More code cleanup and codestyle updates

- Fixed some possible nullref exceptions
- Methods signatures now have up to 3 parameters before breakaing down each parameter in a separate line
- Method invocations have the same rule, except the first parameter will be in the same line as the invocation to prevent some ugliness when passing lambas as arguments
- Applied many more codestyles
- Extensions folder fully reformatted

src/NadekoBot/Modules/Music/Common/Impl/RedisTrackCacher.cs

@@ -10,10 +10,8 @@ public sealed class RedisTrackCacher : ITrackCacher
     private readonly ConnectionMultiplexer _multiplexer;
 
     public RedisTrackCacher(ConnectionMultiplexer multiplexer)
-    {
-        _multiplexer = multiplexer;
-    }
-        
+        => _multiplexer = multiplexer;
+
     public async Task<string?> GetOrCreateStreamLink(
         string id,
         MusicPlatform platform,