Fix fifo files hanging the project wide search (#16039)

Release Notes:

- Fixed the issue related to the project wide search being stuck when
project contains .fifo files
- Might potentially solve the following issue
https://github.com/zed-industries/zed/issues/7360

crates/fs/src/fs.rs

@@ -9,6 +9,9 @@ use std::{fs::File, os::fd::AsFd};
 #[cfg(unix)]
 use std::os::unix::fs::MetadataExt;
 
+#[cfg(unix)]
+use std::os::unix::fs::FileTypeExt;
+
 use async_tar::Archive;
 use futures::{future::BoxFuture, AsyncRead, Stream, StreamExt};
 use git::repository::{GitRepository, RealGitRepository};
@@ -149,6 +152,7 @@ pub struct Metadata {
     pub mtime: SystemTime,
     pub is_symlink: bool,
     pub is_dir: bool,
+    pub is_fifo: bool,
 }
 
 #[derive(Default)]
@@ -428,11 +432,18 @@ impl Fs for RealFs {
         #[cfg(windows)]
         let inode = file_id(path).await?;
 
+        #[cfg(windows)]
+        let is_fifo = false;
+
+        #[cfg(unix)]
+        let is_fifo = metadata.file_type().is_fifo();
+
         Ok(Some(Metadata {
             inode,
             mtime: metadata.modified().unwrap(),
             is_symlink,
             is_dir: metadata.file_type().is_dir(),
+            is_fifo,
         }))
     }
 
@@ -1537,12 +1548,14 @@ impl Fs for FakeFs {
                     mtime: *mtime,
                     is_dir: false,
                     is_symlink,
+                    is_fifo: false,
                 },
                 FakeFsEntry::Dir { inode, mtime, .. } => Metadata {
                     inode: *inode,
                     mtime: *mtime,
                     is_dir: true,
                     is_symlink,
+                    is_fifo: false,
                 },
                 FakeFsEntry::Symlink { .. } => unreachable!(),
             }))