Make a file system path identical independently of operating system path inconsistencies. This converts backslashes into forward slashes.
fn normalizePathAlloc(arena: Allocator, pkg_path: []const u8) ![]const u8
fn normalizePathAlloc(arena: Allocator, pkg_path: []const u8) ![]const u8 {
const normalized = try arena.dupe(u8, pkg_path);
if (fs.path.sep == canonical_sep) return normalized;
normalizePath(normalized);
return normalized;
}