Please describe the problem you're trying to solve

I see several things can be improved for path completion (g <space>) on Windows:

1. Use / separator to trigger folder completion.
2. Smart case matching (i.e typing "prog" can matches "Program Files").
3. On Windows, somehow pressing tab for completion turns the \ to /. For example, I'm at .github\ and the completion popup shows ISSUE_TEMPLATES\ and workflows\. If I select workflow\ and press tab then the input becomes .github/workflows\

Would you be willing to contribute this feature?

• Yes, I'll give it a shot

Describe the solution you'd like

As described above.

Additional context

I was trying to implement the features but can't quite understand the code (e.g I don't know what is word and ticket, and what the Cmd is supposed to do). It would help if you can briefly explain the completion module.