Move field effects data and graphics into own directory, and cleanup naming for object events

graphics/field_effects/palettes/02.pal

@@ -0,0 +1,19 @@
+JASC-PAL
+0100
+16
+0 0 0
+255 255 255
+98 98 98
+213 213 139
+172 172 90
+139 139 65
+230 246 205
+189 238 180
+131 222 180
+98 172 139
+0 0 0
+0 0 0
+0 0 0
+0 0 0
+0 0 0
+0 0 0