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/Shame-on-you-Mojang.patch

@@ -12,7 +12,7 @@ This then triggers async chunk loads!
 What in the hell were you thinking?
 
 diff --git a/src/main/java/net/minecraft/server/BlockBeacon.java b/src/main/java/net/minecraft/server/BlockBeacon.java
-index 1181d45fad..d081166d86 100644
+index 7148ea3692..6d4e82b404 100644
 --- a/src/main/java/net/minecraft/server/BlockBeacon.java
 +++ b/src/main/java/net/minecraft/server/BlockBeacon.java
 @@ -0,0 +0,0 @@ public class BlockBeacon extends BlockTileEntity {
@@ -23,7 +23,7 @@ index 1181d45fad..d081166d86 100644
 +        //HttpUtilities.a.submit(() -> { // Paper
              Chunk chunk = world.getChunkAtWorldCoords(blockposition);
  
-             for (int i = blockposition.getY() - 1; i >= 0; --i) {
+             for(int i = blockposition.getY() - 1; i >= 0; --i) {
 @@ -0,0 +0,0 @@ public class BlockBeacon extends BlockTileEntity {
                      });
                  }