This PR fix the "invalid cross-device link" error occurred in linux when
trying to write the settings file atomically, like when click the
"Enable vim mode" checkbox at first start.
```plain
[2024-02-26T22:59:25+08:00 ERROR util] .../zed/crates/settings/src/settings_file.rs:135: Failed to write settings to file "/home/$USER/.config/zed/settings.json"
Caused by:
0: failed to persist temporary file: Invalid cross-device link (os error 18)
1: Invalid cross-device link (os error 18)
```
Currently the `fs::RealFs::atomic_write()` method write to a temp file
created with `NamedTempFile::new()` and then call `persist()` method to
write to the config file path, which actually do a `rename` syscall
under the hood. As the
[issue](https://github.com/Stebalien/tempfile/issues/245) said
> `NamedTempFile::new()` will create a temporary file in your system's
temporary file directory. You need `NamedTempFile::new_in()`.
The temporary file directory in linux is in `/tmp`, which is mounted to
`tmpfs` filesystem, and in most case(all case I guess)
`$HOME/.config/zed` is mounted to a different filesystem. And the
`rename` syscall between different filesystems will return a `EXDEV`
errno, as described in the man page
[rename(2)](https://man7.org/linux/man-pages/man2/renameat2.2.html):
```plain
EXDEV oldpath and newpath are not on the same mounted
filesystem. (Linux permits a filesystem to be mounted at
multiple points, but rename() does not work across
different mount points, even if the same filesystem is
mounted on both.)
```
And as the issue above said, use a different temp dir with
`NamedTempFile::new_in()` for linux platform might be a solution, since
the `rename` syscall provides atomicity.
Release Notes:
- Fix `settings.json` save failed with invalid cross-device link error
in linux
2f6b290084