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/RangedEntity-API.patch

@@ -32,18 +32,18 @@ index 0000000000..696660b089
 +    }
 +}
 diff --git a/src/main/java/net/minecraft/server/IRangedEntity.java b/src/main/java/net/minecraft/server/IRangedEntity.java
-index 4fd69850fd..7fe65b7c24 100644
+index 1b06ce8537..94533d19af 100644
 --- a/src/main/java/net/minecraft/server/IRangedEntity.java
 +++ b/src/main/java/net/minecraft/server/IRangedEntity.java
-@@ -0,0 +0,0 @@ package net.minecraft.server;
+@@ -0,0 +0,0 @@
+ package net.minecraft.server;
  
  public interface IRangedEntity {
+-    void a(EntityLiving var1, float var2);
++    void a(EntityLiving var1, float var2);default void rangedAttack(EntityLiving entityliving, float f) { a(entityliving, f); } // Paper OBF HELPER
  
--    void a(EntityLiving entityliving, float f);
-+    void a(EntityLiving entityliving, float f); default void rangedAttack(EntityLiving entityliving, float f) { a(entityliving, f); } // Paper OBF HELPER
- 
--    void s(boolean flag);
-+    void s(boolean flag); default void setChargingAttack(boolean flag) { s(flag); } // Paper OBF HELPER
+-    void s(boolean var1);
++    void s(boolean var1); default void setChargingAttack(boolean flag) { s(flag); } // Paper OBF HELPER
  }
 diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftIllusioner.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftIllusioner.java
 index 2ec1af8be4..f31d3eed3a 100644