重构next和hold系统，支持多next

parts/player/gameEnv0.lua

@@ -1,6 +1,11 @@
 return{
-	das=10,arr=2,sddas=2,sdarr=2,
-	ihs=true,irs=true,ims=true,
+	das=10,
+	arr=2,
+	sddas=2,
+	sdarr=2,
+	ihs=true,
+	irs=true,
+	ims=true,
 	swap=true,
 
 	ghost=.3,center=1,
@@ -20,8 +25,8 @@ return{
 	drop=60,lock=60,
 	wait=0,fall=0,
 	bone=false,
-	next=6,
-	hold=true,oncehold=true,
+	nextCount=6,nextStartPos=1,
+	holdCount=1,oncehold=true,
 	ospin=true,
 	RS="TRS",
 	sequence="bag",