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/worktree/src/worktree.rs

@@ -3186,6 +3186,7 @@ pub struct Entry {
     /// Whether this entry is considered to be a `.env` file.
     pub is_private: bool,
     pub char_bag: CharBag,
+    pub is_fifo: bool,
 }
 
 #[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
@@ -3246,6 +3247,7 @@ impl Entry {
             is_private: false,
             git_status: None,
             char_bag,
+            is_fifo: metadata.is_fifo,
         }
     }
 
@@ -5106,6 +5108,7 @@ impl<'a> From<&'a Entry> for proto::Entry {
             is_ignored: entry.is_ignored,
             is_external: entry.is_external,
             git_status: entry.git_status.map(git_status_to_proto),
+            is_fifo: entry.is_fifo,
         }
     }
 }
@@ -5134,6 +5137,7 @@ impl<'a> TryFrom<(&'a CharBag, proto::Entry)> for Entry {
             is_private: false,
             is_symlink: entry.is_symlink,
             char_bag,
+            is_fifo: entry.is_fifo,
         })
     }
 }