Function normalize_relative_path 

pub fn normalize_relative_path(path: &str) -> String

Normalize a relative path by resolving . and .. components using path APIs. Does not touch the filesystem. Always returns forward-slash separated paths. Preserves leading .. that escape above the root, and preserves an absolute root/prefix (/foo, C:\foo) verbatim — both indicate graph escape and must not be silently rewritten into in-graph relative paths.