Split items/ and trainers/ into their data/ and engine/ components

Move some data into a pokemon/ subdirectory

data/pokemon/base_stats/magnemite.asm

@@ -0,0 +1,22 @@
+	db MAGNEMITE ; 081
+
+	db  25,  35,  70,  45,  95,  55
+	;   hp  atk  def  spd  sat  sdf
+
+	db ELECTRIC, STEEL
+	db 190 ; catch rate
+	db 89 ; base exp
+	db NO_ITEM ; item 1
+	db METAL_COAT ; item 2
+	db GENDERLESS ; gender
+	db 100 ; unknown
+	db 20 ; step cycles to hatch
+	db 5 ; unknown
+	INCBIN "gfx/pics/magnemite/front.dimensions"
+	db 0, 0, 0, 0 ; padding
+	db MEDIUM_FAST ; growth rate
+	dn INANIMATE, INANIMATE ; egg groups
+
+	; tmhm
+	tmhm CURSE, ROLLOUT, TOXIC, ZAP_CANNON, HIDDEN_POWER, SNORE, PROTECT, RAIN_DANCE, ENDURE, FRUSTRATION, THUNDER, RETURN, DOUBLE_TEAM, SWAGGER, SLEEP_TALK, SWIFT, REST, FLASH, THUNDERBOLT
+	; end