feat(twin): implemented grapheme

also tidied up.

feat(twin): get_attr now takes chars

feat(twin): get_wc now takes chars

simplified get_wc function

feat(twin): is_wc now takes chars

feat(twin): word_length now uses grapheme

word length calculation now correctly uses number of grapheme clusters rather than bytes.

fix(twin): simplified

- shortened word_length.
- replaced wcscmp with strcmp in word_incorrect.

feat: no longer using wchar

because char is better

fix(menu): menus update on input

feat(file): file can now load long lines.

feat: update

reformatted and misc fixes.

feat(file): simplified location definition

feat(Makefile): added targets for words and quotes

feat(Makefile): update

fix: can now run without quotes/words files

tt can now run without said files

timer: added timer_string

it's a function that converts a duration in seconds to a formatted wide
string in the H:M:S format.

twin: fixed freeing sentences

twin: time duration formatted

the twin title bar in time mode will now show the formatted time left.
This is useful for longer tests.

file: fixed errno

twin: incorrect words are underlined

menu: simplified matches

matches start with all option bits set so it's easier to compare which
options should be displayed