This command sets a bunch of arrays with a complete list of skills the
invoking character has. Here's what you get:

@skilllist_id[] - skill ids.
@skilllist_lv[] - skill levels.
@skilllist_flag[] - see 'skill' for the meaning of skill flags.
@skilllist_count - number of skills in the above arrays.

While 'getskillv' is probably more useful for most situations, this is the
easiest way to store all the skills and make the character something else for a
while. Advanced job for a day? :) This could also be useful to see how many
skills a character has.