windows: Improve file_finder to support match with unix style path (#12357)

Release Notes:

- Improved file_finder to support match with Unix style path.


Sometimes we may get the Unix style path string, for example the result
of `git status`:

```bash
$ git status
On branch improve-file-finder-match-unix-paths
Changes not staged for commit:
  (use "git add <file>..." to update what will be committed)
  (use "git restore <file>..." to discard changes in working directory)
        modified:   crates/file_finder/src/file_finder.rs
```

For example, from GitHub page:

<img width="760" alt="image"
src="https://github.com/zed-industries/zed/assets/5518/c6fe8d8a-839e-4eef-a162-43b1dde09593">

If we copy that path to file_finder, it will not match any files on
Windows.

## Before

<img width="699" alt="屏幕截图 2024-05-28 001037"
src="https://github.com/zed-industries/zed/assets/5518/2d2d729e-7d27-421b-9a38-cfe4e53cc033">


## After

Use Unix style path:

<img width="689" alt="屏幕截图 2024-05-28 001150"
src="https://github.com/zed-industries/zed/assets/5518/e82dc8d6-bd6c-4b78-bd91-5b5210da73c4">

Use Windows style path:

<img width="629" alt="屏幕截图 2024-05-28 001302"
src="https://github.com/zed-industries/zed/assets/5518/4892019e-b2f4-41aa-bbf7-2f5f8af7aafa">

crates/cli/src/main.rs

@@ -54,7 +54,7 @@ struct Args {
 fn parse_path_with_position(
     argument_str: &str,
 ) -> Result<PathLikeWithPosition<PathBuf>, std::convert::Infallible> {
-    PathLikeWithPosition::parse_str(argument_str, |path_str| {
+    PathLikeWithPosition::parse_str(argument_str, |_, path_str| {
         Ok(Path::new(path_str).to_path_buf())
     })
 }