Skylight

1. Skylight is buggy in vanilla MC we cannot really find out what is caused by us and what is caused by MC.
2. Even running "fixing" codes will not help as MC itself will reintroduce these bugs
3. Specifically if we have hard-borders directly at chunk borders we can see those bugs easily

• https://bugs.mojang.com/browse/MC-123584
• https://bugs.mojang.com/browse/MC-162253
• https://bugs.mojang.com/browse/MC-170010
• https://bugs.mojang.com/browse/MC-169913
• https://bugs.mojang.com/browse/MC-170012
• https://bugs.mojang.com/browse/MC-196725
• https://bugs.mojang.com/browse/MC-196614
• https://bugs.mojang.com/browse/MC-199966
• https://bugs.mojang.com/browse/MC-198987