- 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/Services/Impl/RedisImagesCache.cs

@@ -69,11 +69,8 @@ public sealed class RedisImagesCache : IImageCache, IReadyExecutor
         => GetByteData(ImageKeys.RipOverlay);
 
     public byte[] GetCard(string key)
-    {
         // since cards are always local for now, don't cache them
-        return File.ReadAllBytes(Path.Join(_cardsPath, key + ".jpg"));
-
-    }
+        => File.ReadAllBytes(Path.Join(_cardsPath, key + ".jpg"));
 
     public async Task OnReadyAsync()
     {