sys_fs: Updated some fs-related code following up #14086

[brian218]

I implemented fs::get_normalized_path() and accordingly updated some sys_fs code as per the conclusion suggested by @Nekotekina and @elad335 in #14086.

[elad335]

Maybe just make it just a sys_fs static function for now, it's already shown that this implementation does not work for some unicode characters in some locales. We have different alternatives elsewhere like Emu.GetCallbacks().resolve_path that are based on host filesystem path arguments.

[brian218]

Maybe just make it just a sys_fs static function for now, it's already shown that this implementation does not work for some unicode characters in some locales. We have different alternatives elsewhere like Emu.GetCallbacks().resolve_path.

I'll move it to lv2_fs_object.
But as for Emu.GetCallbacks().resolve_path, I remember I tried that too before I adopted the std::filesystem method, and it didn't seem to work for virtual paths (paths that are unrelated to the host file system).

[Nekotekina]

maybe u8path should be used?

[brian218]

MLB the show 16 faces edited after version 0.28 15157 come out with defect

#14081 (comment)
#14088 (comment)
0.0.28-15157 is #13986, so DO NOT CASUALLY SPAM UNRELATED ISSUES IN UNRELATED PRs.