Use Fx* variants of HashMap and HashSet everywhere in Zed (#7481)

Release Notes:

- N/A

crates/zed/src/zed.rs

@@ -733,6 +733,7 @@ fn open_settings_file(
 mod tests {
     use super::*;
     use assets::Assets;
+    use collections::HashSet;
     use editor::{scroll::Autoscroll, DisplayPoint, Editor};
     use gpui::{
         actions, Action, AnyWindowHandle, AppContext, AssetSource, Entity, TestAppContext,
@@ -742,10 +743,7 @@ mod tests {
     use project::{project_settings::ProjectSettings, Project, ProjectPath};
     use serde_json::json;
     use settings::{handle_settings_file_changes, watch_config_file, SettingsStore};
-    use std::{
-        collections::HashSet,
-        path::{Path, PathBuf},
-    };
+    use std::path::{Path, PathBuf};
     use theme::{ThemeRegistry, ThemeSettings};
     use workspace::{
         item::{Item, ItemHandle},