Rename all files in data/pokedex/entries/

Some people suggested this would be a good idea, and make management of
the files easier. I'm inclined to agree.

data/pokedex/entries/cyndaquil.asm

@@ -0,0 +1,10 @@
+; CyndaquilPokedexEntry: ; 0x1ccabd
+	db "FIRE MOUSE@" ; species name
+	dw 108, 170 ; height, weight
+
+	db   "The fire that"
+	next "spouts from its"
+	next "back burns hottest"
+	page "when it is angry."
+	next "The flaring flames"
+	next "intimidate foes.@"