winapi-utf8 - WinAPI: UTF-8 <-> UTF-16 conversion

	Commit message (Expand)	Author
2020-10-27	uniform error messages	Egor Tensin
2020-10-18	much more type-safe & generic overloads	Egor Tensin
2020-10-18	more convenience overloads	Egor Tensin
2020-10-14	prettier error messages	Egor Tensin
2020-10-13	use SafeInt	Egor Tensin
2020-10-04	for UTF-8, only WC_ERR_INVALID_CHARS is supported	Egor Tensin
2020-10-04	clang-format formatting fixes	Egor Tensin
2020-10-04	add string conversion functions + some tests	Egor Tensin