Switch to using ForgeFlower for Paper Only mc-dev imports

ForgeFlower is better than Spigots FernFlower at decompiling the source.

However, in order to maintain the CraftBukkit patches, we must keep
using spigots for the primary.

However, for any file that we import on top of Spigots imported files
there is nothing stopping us from using better decompiled files.

So these changes will use ForgeFlower to maintain a better set of
decomped files, so anything we add on top of Paper can start off
in a better spot.

Spigot-Server-Patches/Optimized-Light-Level-Comparisons.patch

@@ -47,7 +47,7 @@ index 4fc8c5d3c6..0fc39bb9fb 100644
  
              if (random.nextInt((int) ((100.0F / (this == Blocks.PUMPKIN_STEM ? world.spigotConfig.pumpkinModifier : world.spigotConfig.melonModifier)) * (25.0F / f)) + 1) == 0) { // Spigot
 diff --git a/src/main/java/net/minecraft/server/EntityMonster.java b/src/main/java/net/minecraft/server/EntityMonster.java
-index a3449e9a8d..5f60bf04e6 100644
+index f3cc2cef0a..7cba60e475 100644
 --- a/src/main/java/net/minecraft/server/EntityMonster.java
 +++ b/src/main/java/net/minecraft/server/EntityMonster.java
 @@ -0,0 +0,0 @@ public abstract class EntityMonster extends EntityCreature implements IMonster {
@@ -55,7 +55,6 @@ index a3449e9a8d..5f60bf04e6 100644
              return false;
          } else {
 -            int i = this.world.Y() ? this.world.d(blockposition, 10) : this.world.getLightLevel(blockposition);
--
 -            return i <= this.random.nextInt(8);
 +            // Paper start - optimized light check, returns faster
 +            boolean passes;