Optimize achievement loading.

Add a new achievement (heh).
Don't show achievement notifications while the level is ending.

achievements.lst

@@ -0,0 +1,82 @@
+# achievements listed here
+# format: "basename,maxval,hasformat"
+#  basename: the base name used to construct cvars and localization strings
+#  maxval: limit progress value (if any), a value of -1 means it needs special
+#          handling in zscript (usually for cases where this is dynamic, like
+#          the "all collectibles" achievement)
+#  hasformat: the TXT string has a %d in it to substitute for maxval
+abort,0,no
+acid,200,yes
+allcoll,-1,no
+allitems,30,yes
+allkills,30,yes
+allsecrets,30,yes
+anom,25,yes
+anone,0,no
+balls,10,yes
+barrier,25,yes
+bonk,300,yes
+bossdash,10,yes
+brake,30,yes
+bune,200,yes
+bustin,40,yes
+butts,100,yes
+cheat,0,no
+cliffyb,0,no
+clonk,0,no
+conga,15,yes
+#dab,100,yes
+#dakka,60,no
+dime,0,no
+dosh,1000000000,no
+everything,0,no
+ezkill,100,yes
+flight,2000,yes
+friend,30,yes
+fuel,400,yes
+#fuller,0,no
+gcsandwich,25,yes
+#gepgun,30,yes
+ghost,25,yes
+gib,1000,yes
+golden,24,yes
+gravity,25,yes
+#hnd,6,yes
+iwad,7,no
+jump,100,yes
+lead,1500,yes
+#lightning,0,no
+ligma,0,no
+love,20,yes
+#mashiro,0,no
+mbf,0,no
+mega,1000000,no
+moth,50,yes
+nice,0,no
+oneguy,0,no
+onestanding,0,no
+oopsie,0,no
+par,30,yes
+parry,100,yes
+#pene,20,yes
+plush,20,yes
+rage,25,yes
+reflect,20,yes
+refresh,25,yes
+#roast,30,yes
+salt,0,no
+sanic,800,yes
+sekiro,0,no
+shock,30,yes
+slayer,40,yes
+slemg,50,yes
+sneeze,20,yes
+step,60,yes
+stomp,50,yes
+sunny,25,yes
+tele,0,no
+thicc,100,yes
+thruwall,25,yes
+wantdie,0,no
+wave,0,no
+yeet,0,no