reduces loading time (don't have to allocate conversion arrays when
launching a gen7 game), and separates things to easier to manage
locations
reworks gen3 string encode/decode, no longer does 3->4->5 and 5->4->3;
instead goes straight to the end result without an intermediary format.
String sanitization should probably be broken up rather than reused, oh
well.
remove Identifier param. 99% of the time, identifier is not provided,
resulting in a useless call
end result:
provide 'create new' and 'create from' constructors
be explicit that the string is empty rather than possibly missing
disallow encrypted export for BK4 (they're not encrypted), removes type
check
simplify replaceall in showdownset (don't call ReplaceAll 4x, just get
valid chars and rebuild)
simplify get ribbon sprite name (precompute ToLower and appended values
Make extrabytes a pkm property (don't mutate array pls)
reconfigure startup loading to only initialize after initial load of sav
& pkm (using blanks if not provided)
