Fixes the bug where deno deploy on Windows fails to upload any file, surfacing as (os error 123): readfile '/C:/path/to/project/index.ts'.

C:\path\to\project> deno deploy --prod --org=bacek97 --app=app .
⠋ Publishing 'C:\path\to\project'
✗ An error occurred:
  Синтаксическая ошибка в имени файла, имени папки или метке тома. (os error 123): readfile '/C:/path/to/project/index.ts'

The root cause is in collect_files, which returned file paths to JS via path.to_string_lossy(). Because rs_lib is compiled to wasm32-unknown-unknown, PathBuf uses Unix separators and sys_traits::wasm_string_to_path rewrites Windows absolute paths to a Unix-like form (C:\foo → /C:/foo) when crossing into WASM. Every other path leaving WASM goes through sys_traits::wasm_path_to_str, which reverses that rewrite — but collect_files skipped it, so JS received /C:/... strings and passed them straight to Deno.readFile.